you would be better off with cidr of 16
if you use the whois tool, you can see this:
Quote:
inetnum: 180.76.0.0 - 180.76.255.255
netname: Baidu
descr: Beijing Baidu Netcom Science and Technology Co., Ltd.
descr: Baidu Plaza, No.10, Shangdi 10th street,Haidian District Beijing,100080
country: CN
admin-c: WN141-AP
tech-c: JC2179-AP
mnt-by: MAINT-CNNIC-AP
mnt-lower: MAINT-CNNIC-AP
mnt-routes: MAINT-CNNIC-AP
status: ALLOCATED PORTABLE
changed: hm-changed@apnic.net 20090715
source: APNIC
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Basically the block of ips is from 180.76.0.0 to 180.76.255.255 so to block them all you need a cidr of 16