I'm running Ubuntu 18.04, but had the same problem with my previous version (16 something).
99% of the time I am unable to access webpages hosted in China. Pretty much all of the pages I try to access - including major ones such as Baidu - will just not load on Ubuntu.
In Firefox, I get the following message:
Hmm. We’re having trouble finding that site.
This site can’t be reached baidu.com’s server IP address could not be found. DNS_PROBE_FINISHED_NXDOMAIN
But when I try on my Android phone or with my mac, there's no problem at all, the page loads in a second or two.
I have no clue as to where to look to find out what's wrong. Any suggestions?
(It's probably not relevant, but I'm located in Norway.)