In the past, there were no roads. Delivering mail was extremely difficult and dangerous — I had to walk the whole way, and one round trip took six days. Now that roads have been built, I can use a motorcycle to deliver the mail, and I can make five trips a week. The job is still tough, but I feel very proud because I've built a bridge of communication that connects over 20,000 people in the mountains with the outside world.

Sang Nancai, a mailman in Chenggan township, Lushui city, Nujiang Lisu autonomous prefecture, Yunnan province