This YouTube video will show you how to apply for Non-Criminal Record (B3) at the Tunisian Embassy in Beijing
Please remember that the Tunisian Embassy’s Non-Criminal Record cannot be used (with its present form) to apply for a work permit (except in Shanghai).
This is due to the fact that Because the Chinese authorities require the Non-Criminal Record to be validated by the Chinese Embassy in Tunisia,
Another option is to apply for a Non-Criminal Record on your own at https://b3.interieur.gov.tn, then legalize the document using the procedure outlined here.
Form to request the NCR:
For consular fee, please check here.