A person's ID card can only open one securities account in Shanghai, but multiple securities accounts can be opened in Shenzhen. There are two situations in your securities account: First, the original account is normal. You can cancel the designated transaction of the original securities account at the original brokerage firm, go through the account opening procedures at the securities company you want to go to, or you can continue to use the original account! Second, if the original account has been dormant, it can be reopened at any brokerage firm! You can also go to the original broker to activate the original account!