Pic story: An expert's "rail" life (7)

Wang Qichang (L) talks as he touches the concrete sound barrier for high-speed railway in Chengdu, southwest China's Sichuan Province, Nov. 4, 2021.(Xinhua/Liu Kun)

"China's high-speed railway technology is leading the world, and the whole industry is ready for newer and greater development. To adapt to the new development, I still have a lot of new work to do." Wang Qichang said.