The State encourages the use of blockchain to support education

1. 1) First of all, it defines the technical value and positioning of the blockchain. As I said at the beginning, the positioning of the blockchain should take the blockchain as an important breakthrough for core technology and independent innovation
2) blockchain, Internet and artificial intelligence should be regarded as technologies of the same height, and blockchain should formally enter our hard science and technology development category
3) pointed out the development and application direction of our blockchain, including the speech that the technology of blockchain has extended to many fields, such as digital finance, Internet of things, intelligent manufacturing, supply chain management, digital asset trading, and so on. In terms of application, there will inevitably be some regulatory or legal problems in the process of application, What are the instructions in this speech? He mentioned that we should implement the rule of law in the management of blockchain, and promote the safe and orderly development of blockchain
4) in the more important point of application and development, it is mentioned that the blockchain is from virtual to real, enabling entity, improving people's livelihood, obtaining instrial advantages, and better serving the development of the whole instrial economy. In fact, through the study of blockchain technology, from one side or the signal released, we express our attitude towards the innovation and leadership of blockchain. We hope that in the development of blockchain, we can first have our own core technology, and we should be a leader in today's fierce international competition
5) it is to enhance the market confidence of the whole blockchain instry, especially for the application and development of the whole blockchain technology. With a great increase in market confidence, it is bound to attract more people in the next period of time, including the capital market and for example, more talents and research applications will enter this field. More capital, more manpower and more other social related aspects, including the rule of law and legislation, will positively promote the application and landing of the whole blockchain technology. These are my four points of view or summary of blockchain technology learning
if you have been concerned about blockchain for a long time, in fact, from the national level, including the 13th five year plan, blockchain technology has been written into the 13th five year plan, which is developed as a parallel technology with artificial intelligence, big data and cloud computing. It has been introced in the second half of 2018, and the office of network information technology has put the blockchain application service on record, From all aspects, it is actually a positive guidance or protection for the development of the whole blockchain
of course, when it comes to blockchain, you may also say that blockchain always thinks of money speculation and so on. In fact, digital currency is only a relatively narrow field in the field of blockchain. We now include support from the mainstream of modern society or the national level, and more support for the application of blockchain technology in the real instry, The core advantage of blockchain technology is decentralization, which can realize point-to-point transaction, coordination and cooperation based on decentralized credit in the distributed system without mutual trust by means of data encryption, timestamp, distributed consensus and economic incentives, so as to solve the common high cost and low cost problems of centralized institutions Low efficiency and data storage insecurity provide solutions
the application fields of blockchain include digital currency, token, finance, anti-counterfeiting traceability, privacy protection, supply chain, entertainment, etc. with the popularity of blockchain and bitcoin, many related top domain names have been registered, which has a great impact on the domain name instry.

2. Yes, it supports. There are many policies on record. You can see that there are also policies to encourage blockchain entrepreneurship. There are different preferential policies in different places
want to know more about WeChat official account: block chain three

3. First of all, you need to find your own starting point. If you have strong technical strength, you can find the right direction to do some projects that can be implemented, such as blockchain and logistics, the combination of blockchain and government affairs, etc. If you have strong promotion ability, you can take a look at the service provider project of SMIC blockchain public service platform.

4. In the future, the development trend of the media instry will be to realize the vertical integration of various segments and realize the collectivization of the media. However, there are many bottlenecks in the film instry. For movie creators, the problem of infringement and piracy that can not be eradicated all the time can be well solved by using the blockchain technology with tamper proof characteristics. At present, there is a public service platform called blockchain for movies and plays in China, which is initiated by Hunan souyun technology and Hengdian cultural exchange. It seems that it is just doing this.

5. There are many directions for ecation combined with blockchain. China's white paper on blockchain technology and application development in China and the European Commission's report blockchain in the ecation instry have preliminarily discussed the application mode of blockchain in the field of ecation
the application modes of blockchain in the field of ecation are as follows:
intelligent transaction creates an ecation Taobao platform based on Intelligent contract, constructs a community to realize the real "self-organization" operation of online learning community, non school ecational institutions join the market to participate in the formulation of ecation content, and establishes an accessible indivial learning information database to solve the problem of global academic fraud
the branches of online ecation are very extensive, and the ecological structure applied to each branch is also different. The existing online platform should grasp the opportunity of ecological optimization, not only in its own market segments, but also in the whole online ecation market to achieve continuous optimization<

the Xueshuo innovation blockchain Technology Workstation of Lianqiao ecation online is the only approved "blockchain Technology Specialty" pilot workstation of "smart learning workshop 2020 Xueshuo innovation workstation" launched by the school planning, construction and development center of the Ministry of ecation of China. Based on providing diversified growth paths for students, the professional station promotes the reform of the training mode of the combination of professional degree research, proction, learning and research, and constructs the applied and compound talent training system.

6. Theoretically, "blockchain + ecation" can subvert the current Internet ecation instry, but in fact, there is still a long way to go, just as European crowdfunding means "blockchain + crowdfunding"
the structure of blockchain and big data is actually an underlying infrastructure. The various forms of ecation, including music ecation, online ecation and various parent-child activities just mentioned, are quality-oriented ecation for students, and all-round development for children, including personal interests and subject knowledge. From the perspective of blockchain, it is a transfer of bottom value. The other is the integration of all aspects. Parents can carry out an online coverage through the blockchain to find what they need. Whether it's music, sports, dance and other knowledge, they can quickly find some videos or courses; In addition, as long as I have my own knowledge and skills, I can share them, popularize the profession of teacher, and integrate them. The examination platform just mentioned is equivalent to the middle layer, which links up with big data and blockchain to carry out a rapid integration.

7. The development of

1. blockchain technology is the result of resource allocation in market economy. Therefore, the government should still give full play to the role of the market

2. the government should strengthen scientific macro-control, comprehensively use economic and other means to support and guide the development of blockchain technology

3. the government should implement the new development concept, strengthen the supply side structural reform, vigorously develop the real economy, and promote the deep integration of big data, blockchain and the real economy. Build advanced manufacturing instry< br />

8. ① The State implements scientific macro-control, strengthens the supervision of the blockchain market, regulates the order of the blockchain market according to law, and creates a good environment for the development of the blockchain; Formulate and implement instrial policies related to blockchain, increase financial and financial support, and realize the docking of supply and demand. ② We should strengthen the construction of good faith and improve the social credit system.

9. You can start with four fish, because this risk is relatively small. The fish farm with 20 acres of fish is 20T year old. I suggest
first, you should know the climate of the pond, confirm what kind of fish you are looking for, and then look into your local market, see what the price of the fish is, see what kind of fish the local people love to eat, and decide the main fish culture. Then I'll see what to do with the ten Mu open space. Is it to grow grass and feed grass carp, or to develop other sidelines, or to fish? I'm going to graate next year and also plan to engage in fishing. I have a lot of information about fishing on hand. I can send it to you for you to study together
1. What do you need to prepare for fish pond culture< All you need to do is: pump for feeding, depending on the area and quantity.
boat for spraying medicine and fishing, not too good.
net for rain, depending on the size of your fish.
scale for weighing fish and selling fish.
sun umbrella for anglers.
fishing equipment including pole, float, drop and line, not too good
fish medicine and feed, fry
if possible, a set of water quality inspection equipment should be provided< Secondly, the newly excavated fish ponds should be disinfected before fish culture, that is, the pond should be cleaned
quicklime is the best medicine for pond cleaning, and the use method and quantity are the same as those in seedling pond. The pond should be cleaned and disinfected 15-20 days before the fry are put into the pond, preferably in sunny days. The pond water should be drained first to remove silt and weeds. The pond can be disinfected with quicklime, tea seed cake, bleaching powder, etc
quicklime disinfection: 75 kg of quicklime is used for each mu of pond, and there is 8-10 cm shallow water at the bottom of the pond. The lime is dissolved with water in a threshing bucket, stirred and evenly sprinkled on the next day. If there are any wild fish that have been killed, they must be fished out, and the surface sludge at the bottom of the pond must be removed, so as to improve the disinfection efficiency. For some ponds that are difficult to drain, or for fish ponds that have no water source for irrigation, the water depth is 1 meter, and 90-100 kg tea cakes are used per mu. The same method is used to add water, stir it evenly, and then sprinkle it immediately. After 7-10 days of pond cleaning, live fish are put into a small cage to test the water in the pond. After the pond is toxic, fish fry can be raised.
tea cake "pond cleaning": Because tea seed cake contains saponins, it has toxic effect on wild fish, aquatic insect tadpoles and snails, but has no effect on pathogenic bacteria. The usage method is as follows:
first crush the tea seed cake, then soak it in warm water for 24 hours, then add water evenly, sprinkle it on the whole pool, disinfect it in shallow water, use 25-30 kg per mu, if the water depth is 1 meter, use 90-100 kg per mu, clear the pond for 10 days, then put the fry
bleaching powder pond cleaning: bleaching powder contains about 30% available chlorine, which is decomposed into hypochlorous acid and calcium chloride after adding water, and then primary oxygen is released ring the decomposition of chloric acid, which has strong anti-virus effect. For a pond with a depth of 1 meter, use 12.5-15 kg of bleaching powder per mu, add water to dissolve it, stir it evenly and sprinkle it all over the pond. Fry can be released 5 days after pond cleaning
it can also be diluted with 2 grams of rotenone per cubic meter of water, then sprinkled in the whole pool, and the fry can be released after 7-8 days. Then add new water and fish fry feed appropriately, and 75 kg of fermented pig and cow ng can be added per mu< Third, how to choose fish species
fish culture is generally polyculture, and the fish in the upper and lower water layers are all raised to make full use of the space
one or two kinds of fish can be raised together with filter feeding fish, such as silver carp and bighead carp, to maintain water quality
first of all, you need to know what kind of fish you raise. The common herbivorous fish are grass carp, Changchun bream, blunt snout bream, etc. if it is grass carp, you can raise it with grass. The grass carp's teeth can eat the leaves of reed, but sometimes it can't catch the hard straw. It is suggested that the remaining grass should be fished out immediately to prevent its corruption from affecting the water quality, It is necessary to combine green feed with concentrate feed for grass carp culture< How to get high yield in intensive fish pond is a complex ecological environment, and its fish yield is restricted by many factors. The changes of water ecological factors are related to the quality of water quality, and ultimately affect the level of fish proction. The higher the yield is, the more prominent the water quality problem is, which often becomes the main limiting factor to improve the yield per unit area. The key to achieve high yield of fish culture is to master the characteristics of water quality changes in high yield fish ponds and take effective improvement measures< (1) transparency
transparency is the degree of light penetration into the pond water, which mainly changes with the turbidity of the pond water. Turbidity is caused by the mixing of various particles and plankton in the pond water. A transparent plate is usually used to determine the transparency of water. It is made of a round piece of iron with a diameter of 20 cm. A small hole is opened at the center of the circle, a string with a scale mark is put on, and the round piece of iron is divided into four equal parts through the center. Paint the two equal parts of the corner white and the other two equal parts black to make the round iron piece black and white. When measuring, hold a small rope and slowly sink the transparent plate into the water. When you see that the black and white parts of the transparent plate are indistinct, you stop sinking. At this time, the length of the rope immersed in the water is the transparency of the pond water. The simple measurement method is: the palm is perpendicular to the arm, the palm is placed horizontally in the water, and the palm is sunk down to the depth when you just can't see the palm clearly, which is the transparency
transparency can roughly indicate the abundance of plankton and the degree of water quality. Generally, the transparency of 25-40 cm is called fat water. The pond water is thick, not too turbid, and has no fishy smell. It is oil green or yellowish brown, giving people a feeling of tenderness. In this kind of water, fish float in the morning and disappear after sunrise. Transparency is often more than 60 cm, known as thin water, pond water is light, light green or light yellow, fish do not float in the morning. When the transparency is less than 20 cm, it is called old water. The pond water is too thick and turbid. It often has a fishy smell. It is gray blue, dark green or brown with black. It gives people a feeling of old and thick. In the early morning, the fish float seriously, but it does not disappear after a long sunrise. The transparency of high-yield fish pond should be 18-30 cm in April to October and 18-25 cm in May to September
(2) dissolved oxygen
oxygen is one of the necessary conditions for fish to survive. The respiration of fish, shrimp, shellfish and algae all consume oxygen, and the decomposition of organic matter and sediment in the water also consumes a lot of oxygen, so the dissolved oxygen in fish pond water is low and changeable. The high-yield fish pond has a high feeding density, and the fish are often faced with hypoxia, resulting in a large number of floating head or suffocation death. Therefore, there are special requirements for dissolved oxygen variation in high-yield intensive fish ponds. Generally, the surface water of high-yield fish ponds varies from 5.5 mg / L to 18 mg / L in the afternoon, while the bottom water varies from 4 mg / L to 8 mg / L. at 6 am, the dissolved oxygen in the pond water is the lowest, which is close to the critical value of fish floating head (2 mg / L). The variation range of dissolved oxygen will not affect the normal growth of fish, but the measures of increasing oxygen should be taken to increase the yield of fish
(3) oxygen consumption
the oxygen consumption of high-yield fish ponds varies greatly, ranging from 10 mg / L to 25 mg / L, with an average of 12 mg / L to 15 mg / L. Therefore, 12-15 mg / L has become the mark of fertilizer and water
(4) pH
the suitable pH range of fish culture water is 7-8.5. The water quality of high-yield fish ponds is generally weak alkaline, and the pH value is stable at about 8. The water quality has a good buffer, which is concive to the growth of fish
(5) nitrogen and phosphorus
the total amount of three kinds of inorganic nitrogen in high-yield fish ponds is 1-3 mg / L, and the average value is 1.5 mg / L. The soluble phosphate content was 0.1-1 mg / L, with an average of 0.2-0.4 mg / L. The ratio of nitrogen to phosphorus was 7 ∶ 2“ In the "three nitrogen", ammonium nitrogen accounts for 60% ～ 75%, nitrate nitrogen 20% ～ 24%, nitrite nitrogen 1% ～ 2%, and the ratio of nitrogen and phosphorus is reasonable
(6) phytoplankton
there are more than 10 dominant phytoplankton populations in fish ponds, such as Cryptophyta, cryptocyanophyta, Chlorella, cruciform algae, Chlamydomonas, Chlorella, Scenedesmus, microcyclic algae, linear algae, planisphyta, and Euglenophyta. The dominant population of zooplankton is rotifer, and the main species are rotifer crystallocystis, rotifer schizopodis, rotifer verrucosa, rotifer Brachionus calyciflorus, rotifer spinosa, etc. Cladocera and Copepoda are rare, and their biomass is less than 1 mg / L. The number of phytoplankton varied from 10 million to 20 million / L, and the biomass varied from 30 mg / L to 110 mg / L, with an average of 60 mg / L to 80 mg / L. Zooplankton accounts for about 1 / 4-1 / 3 of phytoplankton. There is a positive correlation between plankton and fish proction. One of the keys to high-yield fish culture is "fish culture by looking at the water", so fishermen usually identify the water quality according to the water color, and the water color of fish pond is mainly determined by the species and quantity of plankton< (1) adjust the water quality flexibly according to the water color and transparency
if the transparency of the pond water is too low (less than 20 cm), it means that the water quality is too rich and the plankton reproction is too abundant. When the weather is abnormal, it is easy to die and rot in large numbers, which makes the water quality suddenly change, and then turn clear and stink. Fishermen call it "Stinky water". At this time, the dissolved oxygen in the water is consumed, and the pond water is seriously anoxic, which is easy to cause a large number of fish death. Therefore, when it is found that the water quality is about to change suddenly, it is necessary to flush fresh water or start the aerator in time to increase the dissolved oxygen in the water to prevent the deterioration of water quality. When the transparency is above 40 cm, it indicates that the water quality is too thin and the plankton quantity is too small, so fertilization should be carried out in time. The quick acting method is topdressing with ammonium bicarbonate and superphosphate, 10 kg per 667 square meters of water surface. If the transparency does not return to below 35 cm within 5 days after fertilization, it should be fertilized again. After that, the transparency of pond water can be kept 20-40 cm by fertilizing every 15-20 days and applying organic fertilizer such as human and animal manure properly
(2) timely water injection and raising the water level of the fish pond
ring the peak season of fish growth from April to June, water injection is concted once to three times a month to increase the water depth of the fish pond by 10 cm each time, which can not only supplement the lack of dissolved oxygen in the water, but also improve the water quality
(3) timely start the aerator
in principle, one aerator with a power of 2.5 kW is equipped for every 0.67 hectare of water surface in fish ponds with fish proction of more than 500 kg per 667 square meters. It starts for 1-3 hours a day from April to June and 4-8 hours a day from July to November< (4) turn the sediment to improve the water quality
from May to September, turn the fish pond sediment 1-2 times a month with a mud rake to release the nutrients in the sediment, so as to achieve the purpose of fertilization, recing the oxygen consumption of sediment and improving the water quality
(5) applying chemical fertilizer to improve water quality
from May to September, the ratio of nitrogen and phosphorus was 1 ∶ 1. The application of 4-5 kg per 667 square meters of water surface, once every 3-4 days, can not only increase the biomass of pond water, but also achieve the goal of biological oxygenation< (6) lime is used to improve water quality
from May to August, the whole pond is sprinkled with quicklime solution once or twice a month, so that the drug content of each cubic meter of water body is 25-30g, which is helpful to improve water quality
(7) cleaning
clean the pond water regularly to keep the water clean
through the above measures, the high-yield fish pond can maintain the best water quality of "fertilizer, liveliness and freshness"“ "Fertilizer" refers to the abundant dissolved nutrient salts in the water and the large number of plankton species“ "Live" refers to the rapid circulation of nutrients in water, the water color is lighter in the morning and thicker in the afternoon“ "Shuang" means that the pond water is rich but not turbid. Fish grow fast and have few diseases in such good water quality