First check whether there are factory certificate and product certificate. They are the "identity certificate" of diesel engine, which are necessary.

Check the three numbers of the certificate again: 1. Name plate number 2. Body number (generally on the plane machined at the flywheel end, the font is convex) 3. Oil pump name plate number. Check these three numbers with the actual numbers on the diesel engine to ensure that they are correct,

In case of any doubt, the three numbers can be reported to the manufacturer for verification.