The latest video and pictures show that the Chinese army uses military trains to transport large numbers of red flag-16 surface-to-air missiles to Tibet. The Red Flag-16 is able to defend important military facilities and other important nodes, which means that the PLA has been prepared for war.
As for why to transport so many red flags-16 to Tibet, a very important reason is that the Indian army deployed a lot of air combat forces in the front line, including Su-30MKI and other advanced fighters.
In addition, India also opened near China's Parsippa frontier airport, and a Su-30MKI fighter deployment to this.
It is said that this is India in Arunachal Pradesh (ie, the southern region) put into operation in the 8 frontier airport in the first five.