appcoins1btc

1. China's three major exchanges or five major exchanges
the three major exchanges refer to bitcoin China, OK and fire currency
the five major exchanges are: bitcoin China, OK, fire coin, China bitcoin and bitcoin trading network
other digital currency exchanges include biter, jucoin, Fuyuan, etc.

2. I haven't heard of it. Many of the
information on the Internet is
that they have been cheated and that they are unreliable.