It's right that you can't buy it. On that day in October, the market makers withdrew liquidity, which directly caused everything I bought to drop to zero. If you trade contracts, you can still get compensation, but if you want to play with this, the customer service won't even pay attention to you.
Hello, you can contact our online customer service (app home page - top left corner icon - pop-up page click the top right corner - contact customer service - "Can't find the answer, click here" - enter "manual" in the input field below - reply message select "transfer to manual" and choose the relevant question) to provide relevant screenshots of the issue for verification and processing.