Signing or fingerprinting have the same legal effect. If the employee signs the resignation report, it is also valid without fingerprinting.

According to the Interpretation (2) of the Supreme People's Court on Several Issues Concerning the Application of the "Contract Law of the People's Republic of China"

Article 5: If the parties conclude a contract in the form of a contract, It should be signed or stamped. If the parties concerned press their fingerprints on the contract, the people's court shall determine that it has the same legal effect as a signature or seal.