Revision History

Date	Revised content
2021/08/20	Deleted the unused error code 2006 from Chapter 1 Face Compare and Chapter 2 Quality Check. Added descriptions to the error code 2003 and 2004 in Chapter 1 Face Compare and Chapter 2 Quality Check. Deleted the unused liveness status from Section 1.4 /identity/silent_image_verification/stateless and Chapter 3 Liveness Detection.
2021/03/08	The first edition released