Alipay flash chain loan signing is fast. According to the public information related to the query, the flash tag adopts multi-signature intent authentication. When the user's real name is authenticated, the system automatically generates the private key of the digital certificate matching with the electronic signature, which ensures the uniqueness of the electronic signature. In addition, users need to pass the financial face recognition authentication every time they sign online, so as to avoid signing on their behalf, and the account will arrive in 3 minutes at the earliest, which will not exceed 3 days.