More flexibility on flight stopovers in China. If you are going somewhere else, China would probably like for you to spend some of your money in a Chinese city. I’m guessing 10 days is the duration because flights occasionally get canceled or delayed. A lot more people would need to apply to extend their visas on stopovers if it was only like 3 days.

Edit: spelling

IBM profiting from a genocide?? Say it ain’t so!