This line starts from Lhasa and proceeds southwestward by Chashih following the former imperial highway by Yitang and Kiangli to Chushui. At Chushui, it crosses to Sanpo River over the Mulih Bridge to Chakamo on the south side, thence to Tamalung, Paiti, Tabolung, and Nagartse. After Nagartse, the line turns westward to Jungku, Lhaling, and Shachia. At Shachia, the line leaves the former imperial highway and turns southwestward again and proceeds via Kula to Yatung at the Sikkim border. This line covers a distance of 250 miles. f. The Lhasa-Laichiyaling Line and Branches This line starts from Lhasa and proceeds northwestward by Chashih following the former imperial road to Little Taking, and westward to Yangpachin and Sangtolohai. Thence turning southwestward, it proceeds to Namaling and Tangto, and crosses the Sanpo River at Lhaku. After Lhaku, the line turns westward to Shigatse, the second important city in Tibet whence it proceeds in the same direction to Chashihkang, Pangcholing, and Lhatse all on the right side of the Sanpo River. From Lhatse, a branch line starts southwestward via Chayakor and Dingri to Niehlamuh on the Nepal border. The main line, however, crosses to the left side of the Sanpo River and proceeds on the same highway via Nabringtaka to Tadum where another branch line proceeds southwestward to the Nepal border. The main line continues northwestward via Tamusa and Choshan to Gartok, thence turning westward it proceeds to Laichiyaling on the Sutlej River and ends on the Indian border. This line, including the two branches, covers a distance of 850 miles. g. The Lhasa-Nohho Line This line starts from Lhasa and runs in the same track as line (f) to Sangtolohai where it proceeds by its own line northwestward to Teching, Sangchashong, and Taktung. Thence, it enters into the richest gold field in Tibet and through Wengpo, Tulakpa, Kwangkwei, and Ikar reaches Nohho, where the line ends. It covers a distance of 700 miles. h. The Lhasa-Iden Line This line starts from Lhasa, following the common track of lines (f) and (g) to the southwestern corner of Tengri Lake, whence it proceeds by its own track northwestward by Lungmajing, Tipoktolo and four or five other small places to Sari. After Sari, the line penetrates a vast tract of uninhabited land to Pakar and Suketi. Thence crossing the mountain passes and descending from the highland to the Tarim Basin through Sorkek to Yasulakun, the line joins the Cherchen-Iden railway of the Northwestern System and proceeds on the same track to Iden. This line covers a distance of 700 miles. i. The Lanchow-Chochiang Line