Self-driving from Ya'an - Kangding - Zeduo Mountain - Xindu Bridge - Yajiang - and dozens of kilometers to Litang Branch Road 307. We took the foot mountain road to catch up with the most memorable night of road construction. I couldn't go. I stayed on the mountain for one night and stayed on the mountain for one night. The next day at 10 am: 30 to the Asian Youth Competition. To be honest, when I saw those senses of purpose, I was moved. I couldn't imagine what motivation could have kept them in this place where I thought I was going to be difficult for three days...