During the period of the Fourth Five-Year Plan, 1971-75, the Chuchou-Kueiting line, which forms part of the east-west trunk line from Hangchou to K'unming, was completed, while other possible construction included the central segment of a line linking Peking with Yuanping, Shanhsi province, and lines linking Wuhan through Ank'ang, Shenhsi province, with Chungking, Ssuch'uan province, and with Luehyang on the Paochi-Chengtu line.
Source: wiktionary