Comrade Yang Yong:

You are the commander of the committee. I hope you will design meticulously and construct meticulously. In the course of construction, there will certainly be not a few mistakes and failures; pay attention to correcting them at any time. This is my most earnest hope!

Mao Zedong
February 4

[1]
Yang Yong, then serving as Deputy Chief of the General Staff of the Chinese People's Liberation Army and concurrently Commander of the Beijing Military Region and Head of the Beijing Underground Railway Leading Group.

[2]
Refers to the report submitted on January 15, 1965, by Yang Yong, Wan Li (Secretary of the Beijing Municipal Committee of the CPC, Vice Mayor of Beijing, and Deputy Head of the Beijing Underground Railway Leading Group), and Wu Jingtian (Vice Minister of Railways and Deputy Head of the Beijing Underground Railway Leading Group) to Peng Zhen, Li Fuchun, and the Central Committee, concerning the construction of the Beijing underground railway. The report includes five parts: construction policy, route plan, protection level, project cost, and preparatory work.