Not seen anything serious from this IP range before but today there was a flurry of yahoo slurp china from it.
UA is: Yahoo! Slurp China
Which is not the usual Yahoo bot so it may be faked, although if true why so many IPs? Haven't check if it's true bot behaviour, robots.txt etc.
There may be more IPs within the Alisoft range running this bot but this is all I've seen so far. No Yahoo rDNS: all I've checked have been UNKNOWN-(ip)-aliyun.com. There may also be non-bot IPs within the given range - I haven't made substantial checks.
"Yahoo slurp" range (approx): 18.104.22.168 - 22.214.171.124
Host rangeAlisoft Singapore: 126.96.36.199 - 188.8.131.52
Part of China CNNIC range.