It's not a bad name, but you would have to find a VERY interested buyer in order to make a sale.
After all, anyone could come up with a similar name with about a half-hour of brainstorming. Just find an appropriate synonym for "plaza", or another word entirely.
chinesemarket, chinesecentral, chinahome, productsfromchina, chinesegoods, chineseproducts, chinesetrade, buychinese, itschinese, chinesecenter, chinesebazaar, .... and on and on....
Any one of these would be sufficient. BTY, I haven't checked any of these for availability.
Now, if you had chinatown.com, that would really be something.