Online account opening means that after an investor logs into the online account opening system of a securities company with a valid digital certificate and signs an account opening agreement, the securities company opens an account for the investor in accordance with the prescribed procedures. Investors apply for a digital certificate from a securities company or an electronic certification service institution designated by a securities company, and go through the online account opening procedures based on the digital certificate, which is a form of independent and self-help account opening for investors. Online account opening is an innovative business. Compared with on-site account opening, it breaks through the time and geographical restrictions, and the future development trend can realize 7*24 hours account opening.