It is a national certificate for jewelry and jade testing.

It is the most authoritative jewelry appraisal institution in China, National Inspection Institute (NGTC).

Your diamond ring is uranium Pt950 diamond ring

Precious metal detecting uranium Pt950

Diamonds below 10 will not be classified by national inspection, so color: none.

There is nothing wrong with the certificate. You can wear it safely. I hope the answer will help you.