China ban moved the industry OUT, that is all. Once the miners set up elsewhere, and the Chinese government realizes all the income they have lost from possible tax revenue and electricity charges, then they might change their mind.
It is clear that when they sell, the price falls) But in any case, there is some reason that causes mass sales of coins. It is quite possible that someone decided to buy a yacht and sold 1000 BTC at the market price, which led to panic sales. The second option is when whales use negative news to lower the price of the coin.
And when the Chinese government becomes loyal to the miners again, this will certainly lead to a short-term increase in the price of the coin.
Trust me,,, people sell much more than 1000 BTC every day on a single exchange. Nobody who was that amount of Bitcoin deposits it on an exchange and sells it all, he would suffer from so much slippage he would probably get 20% less than what it was worth, and then again these days that 1k BTC is like a drop in the ocean.
Forget China, they are the regular dump cycle masters:)