You can test you broadband speed for some of the websites. The websites can test your PC connect to HK or other country. You can find that your connection speed has been slowed down as you connect to other country.
These website will check your upload and download speed.
Here are the website for your reference:
http://netspeed.nwtbb.com/
http://speed.kccw.net/
http://www.speedtest.net/
http://www.speedtest.com.hk/
