A group of People's Liberation Army (PLA), dubbed the "couriers in the skyline", has successfully delivered scarce supplies to their comrades in Bangda Township, southwest China's Tibet Autonomous Region in a week after multiple difficulties and obstacles over the 2,500-mile journey.

The Sichuan-Tibet highway, which has an average altitude of 3,500 meters, is one of the most dangerous roads in the world. The chilness, oxygen shortage, avalanches and icy roads are frequent scenes here.

They have suffered snowstorms when climbing over the 4,000-meter-altitude Kazila Mountains. The vehicles were stopped and put on the anti-slip chains. "We are not panicking and can handle tasks decisively thanks to our frequent practical trainings, which equipped us with courage and uprigtness," said the Commander Huang Chong. (Compiled by Shan Xin)