As far as I recently read, china hold at least 20% of bitcoin around the world. They also have the biggest bitcoin mining due to the cost of electricity in their country was very low.
But i don't think that bitcoin will go down just because of that because other countries in ASIA are starting to adopt Bitcoin.
Bitcoin's price is very variable and any news, positive or negative, can affect bitcoin.
The price of bitcoin fell due to bad news from China but also from Morgan.
Of course, when panic begins, it is difficult to stop it and price starts to fall.
Bitcoin will eventually recover when some positive news appear and demand becomes bigger than the offer.