The relative holding of Hong Kong, Macao and Taiwan businessmen needs to be penetrated. At present, A shares are subject to penetrating supervision, including penetrating into investors' accounts. After more than 20 years of development and exploration, China's capital market has established a series of supervision systems that have been recognized and affirmed by the international community, such as "penetrating supervision" of the securities market and safe depository of the futures market.

According to the CSRC, after the implementation of the northbound transparency mechanism, investors in northbound transactions will provide information related to identity codes, which will help the front-line supervision of the exchange and the supervision and enforcement of the China Securities Regulatory Commission, and maintain market order.