You don't need to buy stocks. If you send 8 shares for every 10 share, then 400 shares are 320 shares. In addition, if every 10 share is sent 1 yuan 1 minute, the tax will be 20%. You can work out how much cash you can get.

I remember that after ex-rights, the stock price will drop by 80%, which is similar to the bonus deducted by the fund after ex-rights, except that the stock will fall in proportion and the fund will deduct the bonus.