Article 13 of the Notice on the Implementation Measures for Online Purchase of Initial Public Offerings in Shanghai Market at Market Value stipulates that:
Article 13 Before accepting the subscription entrustment, the investor shall deposit the subscription money in full into the capital account opened by the securities company designated for trading. During the subscription period, investors fill in the entrustment form at the issue price by entrusting to buy shares. Once a bill is declared, it shall not be revoked. The purchase number is allocated according to the actual effective purchase, each effective purchase unit is allocated a number, and all effective purchase units are allocated numbers continuously in chronological order.