Definition of "Pingtingshan"

At Ho-pi (Hopi) in northern Honan two modern shafts were under construction in 1957-8; but the coal from Ho-pi is expected to be of rather poor quality and so will be mixed with rich coal from P'ing-ting-shan (Pingtingshan) in central Honan for coke making.

1963, “The Coal Industry in Mainland China Since 1949”, in The Geographical Journal‎, volume 129, number 3, page 333

Abundant high-quality coal is present in the Pingtingshan mine where the Western Honan Hills meet the Huang-Huai Plain.

1964, Yu-ti (任育地) Jen, “The Middle and Lower Yellow River Region”, in 中国地理概述 [A Concise Geography of China]‎, Peking: Foreign Languages Press, page 84

Factories, mines, and other enterprises were badly disrupted as workers quit their jobs. At the Pingtingshan colliery in Honan province, for example, when more than seven thousand miners left for Peking, the output of coal declined.

1972, Stanley Karnow, Mao and China: Inside China's Cultural Revolution‎, Penguin Books, published 1984, page 268