Our country’s law does not clearly stipulate which finger should be used for fingerprinting. Fingerprinting is to indicate the identity of the other party, so in theory, any finger can be used. Chinese law stipulates that if the parties conclude a contract in the form of a contract, the place where the last signature, seal or fingerprint is taken shall be the place where the contract is established. Therefore, fingerprinting generally occurs when entering into a written contract, and fingerprinting is used to prove the identity of the other party.

Legal basis: Article 493 of the "People's Republic of China and Civil Code" If the parties conclude a contract in the form of a contract, the place where the last signature, seal or fingerprint is taken shall be the place where the contract is established. location, unless otherwise agreed upon by the parties.