Fingerprints were used as identifying marks in ancient China during the Qin and Han dynasties as early as 246 BC .
The seal would also contain a left thumbprint embedded on one side and a Chinese script on the other for authentication .
Fingerprints were used as identifying marks in ancient Chinese during the Qin and Han dynasties as early as 246 BC .
The seal would also contain a left thumbprint embedded on one side and a Chinese script on the other for authentication .