A criminal record check will determine if you have been charged or convicted of a crime. If a name-based criminal record check does not provide a definite way of confirming your identity, you may be asked to provide fingerprints. The use of fingerprints is the most accurate way to confirm a person’s identity. They ensure that individuals cannot evade their criminal past and protect individuals from being falsely associated with a criminal record that is not theirs.
FYI this document must be within its six-month validity when you arrive in China.