Looking for an H-share securities company as an agent, you can do it in the Mainland. The procedure is very simple. With a copy of your ID card and proof of your residence address, you can go through the formalities of opening an account in a domestic securities company that can open an account in the Hong Kong stock market.
First of all, our discussion here may not be protected by domestic laws. We think you have been approved by the State Administration of Foreign Exchange to invest in overseas securities. In this way, you can choose Hong Kong securities firms or invest in Hong Kong securities or stock index futures on behalf of Hong Kong securities. Such companies must be legally registered with the Hong Kong Securities Regulatory Commission and have seats on the Stock Exchange and the Futures Exchange. Their registration information can be found online. Please check it before opening an account.
HKEx only accepts member accounts, not personal accounts.
Members of HKEx are all trading brokerage licence holders (or holding institutions), which are actually stock brokerage companies and banks in Hong Kong. Almost every bank in Hong Kong buys and sells stocks as an agent. For example, Bank of China Hong Kong Branch provides stock trading services to all customers of BOC Hong Kong Branch through eleven trading brokerage licenses held by its Hong Kong subsidiary "BOC International Securities Limited".