See my other comment.
* The popularity of that browser is way over reported - they tend to report "installed" statistics rather than "used".
* If you read the article you'll see self signed certificates were used for the MitM. From my own research, 360 secure browser just doesn't validate certificates in many circumstances. No CA required.
According to my observation Qihoo Browser was more frequently used by a tech noob than tech savvy. And this alone poses great risk of the general public regardless to the underlying ethnics and interests.
It said in the article: the most popular Chinese browser Qihoop 360 browser doesn't even giving a warning for the bad SSL cert. "Qihoo’s popular Chinese 360 secure browser is anything but and will load the MITMed page directly."
https://en.wikipedia.org/wiki/Qihoo