According to the requirements of the Chinese Embassy, from the 17th December 2019, all applicants aged between 14 and 70 must register their fingerprints in person at the Visa Centre. A photo will be taken by the Visa Centre staff at the same time. If you want to entrust someone elsa to do so, the entrusted person will be responsible to confirm with you about the submission and the fingerprint collection.
Applicants' fingerprints will  be stored for 5 years. Applicants who have completed fingerprints collections and applied for Chinese visas within 5 years with the same passport at the same visa centre will not have to get their fingerprints collected again. Applicants shall bear all the legal consequences including denial of entry for forged fingerprints or using other people's fingerprints for visa application.