https://www.youtube.com/watch?v=nvzeAi0wU14&list=PLZcxKAzkzqN-iTTu6mSk15YBZ90TvYtVH&index=9
Peng Liyuan in 1984
Source
The Jincheng River hydroelectric equipment factory in 1973
Guangxi 1973年魏守平在广西金城江水电设备厂进行集成电路型水轮机调速器出厂试验 Source
by Covell Meyskens
Source
Guangxi 1973年魏守平在广西金城江水电设备厂进行集成电路型水轮机调速器出厂试验 Source