YYSpider

[keyplyr]

UA: Mozilla/5.0 (compatible; YYSpider; +http://www.yunyun.com/spider.html)
Protocol: HTTP/1.1
Robots.txt: Yes using UA: Mozilla/5.0 ()
Host: Chinanet
101.224.0.0 - 101.231.255.255
101.224.0.0/13

URL did not resolve for me.

[w3bmastine]

FYI: News reports from 2012 say, Yun Yun is a social search service (social microblog search platform that also provides a mobile advertising service) developed by a team of former Googlers, led by the former head of Google China’s Chinese-language search, who went off on their own after Google’s retreat in 2010.

[keyplyr]

Well these "former Googlers" need to pay their DNS bill :)

This domain does not point to an IP address (neither IPv4 nor IPv6) so the company may now be defunct and someone forgot to pull the plug - or - the bot is a fake.