When you are on VPN, websites located in China like baidu.com will be slower.
You can use this script to solve this issue. Run runthis!_applyroute.exe before connecting to VPN and your VPN will be only used on websites located outside China. In this way, you can save your VPN data transfer and get faster connection to Chinese websites.
http://breakwall.net/soft/route.zip
Project URL:
http://code.google.com/p/chnroutes/downloads/list
