I think you now need a registered business in mainland China to buy .cn domain.(check this) Many Chinese websites don't use .cn domains. E.g 51.la tudou.com,

I think you now need a registered business in mainland China to buy .cn domain.(check this) Many Chinese websites don't use .cn domains. E.g 51.la tudou.com, mtime.com, douban.com Later these sites registered .cn .com.cn I don't know of any big sites that use Chinese characters as their primary address(if you know of any please link in comments. It's actually easier and quicker to type the pinyin(romanized letters) into the url bar. Finally many for many Chinese websites the name is pretty unimportant as long as its easy to remember.