On May 28, according to Yicai, since late May, multiple banks in Hong Kong have required clients to visit branches to sign 'cross-border disclosure statements' and have repeatedly inquired about details such as the source of funds and transaction records. Some banks have even politely refused to activate investment account features. Meanwhile, banks and brokers have begun investigations into existing accounts. Behind the tightening of regulations lies a long-standing gray industry chain. Previous investigations found that some intermediaries assisted mainland residents in bypassing regulations to open accounts with Hong Kong brokers by creating false investment proof and providing 'invitation codes.' Now, in light of policy adjustments, these intermediaries are promoting the 'last window period,' continuing to attract clients under the guise of 'internal channels' and 'account opening secrets,' but the links they provide mostly lead to small and medium-sized brokers in Hong Kong, and the methods have become more covert.