They are trying to control the movement as much as they can in order to accumulate more cryptos which I think very possible reason. Some people knew that this event of banning crypto is a sweet game for them but devastating for others specially those who bought Bitcoin during $40k or $47k. Very possible that in few months everything will be fine again.
I don't think it's a control. China issues regulations to ban crypto. after mining now there is very unfavorable regulation for the crypto market.
it's not in China's interest. or people in China who do mining and crypto transactions.
This news is different from other bad news. this is very bad for the crypto industry players in China.