For now, We can't make any more assumptions about what they are really trying to implement aside from making their own cryptocurrency. Their movement is being monitored every single day and giving a lot of positive and negative news about it, it's really good I think, but it's really hard to predict their movements. We should just wait for them to state what they really are after.
even if China successfully launches its own crypto, it will not affect the crypto market even bitcoin. because the real purpose of China is not that. they are more interested in monitoring their citizens. the Chinese government wants to oversee all online activities of its citizens, especially those related to finance. they are one of the countries that have anti-money laundering policies and I see that the country is quite strict with this. that's why they want to launch this.
but from some sources that I read, another reason is because they don't really like bitcoin. they want their citizens not to use bitcoin, that's why they make crypto coins.
It will affect, it's either in positive or in a negative way. We still don't know until they released it. The Chinese government not only wanted to monitor but also to control everything, they wanted to grab every opportunity for the increase of their economic power.