Citic securities. Straight flush is a third-party trading software, and the account opening fee is generally 30,000 yuan by default. CITIC Securities is a regular brokerage firm. When opening an account, you can contact the online manager in advance to negotiate the commission for opening an account. The same commission will also have some preferential space, which will be more suitable, so CITIC Securities has a low commission. CITIC Securities Co., Ltd. is a comprehensive securities company approved by China Securities Regulatory Commission.