Shanghai market: investors can only use one securities account in the online subscription process of convertible bonds. If the same investor uses multiple securities accounts to subscribe for the same convertible bond, or if the investor uses the same securities account to subscribe for the same convertible bond many times, the initial subscription of the investor shall be deemed as valid subscription, and other subscriptions shall be invalid subscription.
The principle of confirming that multiple securities accounts are held by the same investor is that the "account holder's name" and "valid ID number" in the securities account registration materials are all the same.
Shenzhen market: During the online subscription of convertible bonds, investors can only subscribe for each securities account once, and once the subscription is confirmed, it is irrevocable. Multiple subscription orders for convertible bonds in the same securities account shall be deemed invalid except for the first effective subscription.
References:
Detailed Rules for the Issuance of Convertible Corporate Bonds of Listed Companies of Shanghai Stock Exchange and Guidelines for the Issuance and Listing of Convertible Corporate Bonds of Listed Companies of Shenzhen Stock Exchange.