163data.com.cn Spammer: Research, Ban
163data.com.cn is a very prolific content spammer. While they operate out of Chinanet Fujian Province most of the time, they will take IPs from all over China. You can see the province in their ip address. I get spam from them at least every week, and much more if they have a spam campaign.
I have tried banning their host name but this does not work. You need to ban by IP address, unfortunately.