Has anyone used OnlyDomains.com or know about registry requirements?

I noticed onlydomains.com does alot of country code domains most other places don’t, So I decided to register a few, I had no problems so whatever, but while trying to register a chinese .CN domain name I was asked to provide scanned ID as “per registry requirements” has anyone ever come across this before? [URL=“http://www.onlydomains.com/country/domain/China/.cn”]http://www.onlydomains.com/country/domain/China/.cn