Great report!! That runway next to Vang Vieng was a Lima site. The picture of that check point into Vietnam brought back memories. I was on a Minsk with a Vietnam plate, and crossed there into Vietnam from Laos a few years ago. Beautiful area on both sides of the border. I admire the pluck of those guys taking giant tour bikes down jungle trails. Bet there was more than a few falls..... :-)
I have a Qingqi 200 which is virtually the same bike as yours. Currently has 36,000 kilometers on it. Made possible by careful riding and synthetic oil.
As I am sure you are finding out, Chinese metallurgy still has a ways to advance.