In the case creation email, I was asked to mail all civil documents in one package to NVC PO Box. I am required to obtain a police certificate from Hong Kong Police. However, in the U.S. Visa: Reciprocity and Civil Documents by Country, under Hong Kong it says "Please do not request that the 'Certificate of No Criminal Conviction' or an appropriate reply together with the applicant's police record be sent directly to the National Visa Center, as this may cause delays in your case."
U.S. Visa: Reciprocity and Civil Documents by Country - Hong Kong
