The average brokerage firm can give a commission of three to four tenths. If the commission is 300W, it will be around 4000 yuan. If it is 30,000 yuan, 4,000 yuan may not be available. If the commission is 3000 yuan, it may be 8000 to 10000 yuan (calculated according to the stock market value of 400W). However, this is one-off, and the future commission will be calculated according to the transaction commission, which is different for each company.