Their record of 240,000 users registered in just 1 hour tells it.
It cannot be closed easily because of its popularity.
Maybe the Chinese government could just use this to make money for themselves since trading website creates a lot of money than the trader inside it.
To be honest, the Chinese government has no control over the exchanges.
The Chinese government is unable to obtain real data, let alone impose restrictions on these exchanges, even if the data and bills are not available.