Very, Very Slow To Get On And Look At Posts

I have the very same problem, intermittently but regularly. I also had the same problem with another page, Heritage Auctions, and got together with their IT people to see if it was on their end. A lot of experimentation, including giving them remote access to my computer to see what they could see, pretty much proved it was due to my ISP.

Just like your browser caches pages you visit locally so they'll load quicker the next time, so does your ISP. Just to be safe, clear your browser cache but it probably won't help. Chances are it's your ISP. Try another browser to see if the problem remains; if it goes away the cause is on your end but I don't think it will help.

The next time you post a reply and it goes slowly, make sure you look to see the "rattled this chance" message Bobby mentioned. Chances are you'll see that message reflects a very fast posting time, even though what you see on your screen moves very slowly. If that is the case, it's your ISP and there's not much you can do about it aside contacting them. I don't know about China, but here in the US, contacting your ISP about some problem is about the same as contacting a tree in your back yard about it.

The site runs the same regardless of what browser you use, it doesn't care. It's IE that's slow.

And I find Firefox to be the most reliable as well. Most often the quickest, too.
I no longer use IE nor Opera, though they are still available to me.

Maybe I could help...
The Wifi in China (where I was born) is only fractional than the Wifi distribution in Canada. It really depends, in my experience. Do you use wireless or wired network? Wired was too slow when I was in China.
Plus, you must understand that this site may not be a website that the chinese government is familiar with. You maybe the only user in the entire China. This could raise your suspicion.

I haven't had any issues with firefox with any page loading slow