Opening the face is a system optimization, and the signing is a preventive and supervisory measure. Brush face service is the optimization and upgrade of CCB system. It gets rid of the traditional authentication mode of inserting bank card, entering password after reading card, inserting ID card and taking photos to verify identity. You only need to brush your face to complete the identity verification, and the operation time is shortened from 80 seconds to 15 seconds, which solves the problem that you can't handle the business in time because of the lack or damage of media such as bank cards, passbooks and ID cards, and promotes the digitalization and intelligence of the business handling process. Signature is the personal information filled in when the People's Bank of China requires customers to apply for a card. You must sign it yourself, which is a preventive and supervisory measure. Therefore, when I do business in China Construction Bank, I said that I need your signature to open my face.