It doesn't matter if the Shanghai stock market or the Shanghai stock market fund can't be added, but it doesn't matter if the Shenzhen stock market can be added. The account number of the deep fund that has been opened before can be queried on the China settlement website, and a securities account can be added. First, there are restrictions on the subscription of some funds, and investors can increase the number of subscriptions through multiple accounts. Secondly, for funds with subscription restrictions, if there are arbitrage opportunities, multiple accounts can generate multiple benefits.