It would be great buying safely from them. 
Would they offer a bidding site in english then?
CCL has a feed of all ongoing Chinese coins in auction at any given time, for example 1357 identified right now from 13 of 102 different auctioneers we track.
You can filter by grade and/or metal and/or vendor and some other neat filters like 'not seen in last 120+ days' or do a keyword search etc.
This is available in English and Chinese. Bidding takes place at the vendor site itself, not through Chinese Coins Live.
At some point we hope to allow bidding within the website for our expert licensees.
Zhao Online have an English website, (YJZX do not), where you can bid but they will only ship within China.