This line starts from Dolon Nor and proceeds in a northwesterly direction, following the caravan road across the vast pasture to Khorkho, Kuoto, and Suliehto. After Suliehto, it crosses the boundary line into Outer Mongolia by the same road to Khoshentun, Lukuchelu, and Yangto. Thence it crosses the Kerulen River to Otukunkholato, and enters the hilly region where it crosses the Kerulen watershed and the Chikoi watershed. The water from the Kerulen watershed flows into the Amur, and thence into the Pacific Ocean, while the water from the Chikoi watershed flows into Lake Baikal, and thence to the Arctic Ocean. After crossing the Chikoi watershed, it follows a branch of the Chikoi River to Kiakata. This line covers a distance of about 800 miles.
b. The Kalgan-Urga-Tannu Ola Line
This line starts from Kalgan at the Great Wall, and proceeds northwestward up the plateau, crosses a range of hills into the Mongolian prairie, and goes to Mingan, Boroldshi, Ude, and Khobor, where it crosses the Dolon Nor-Urumochi trunk line. After Khobor, it proceeds across the vast and rich pasture of Mubulan, then proceeds in a straight line through Mukata and Nalaiha to Urga. From Urga, it goes into the hilly district crossing Selenga Valley to a point opposite the southern end of Lake Kos Gol, and then turns northward across a range of mountains to Khatkhyl on the southern shore of Kos Gol. After Khatkhyl, it skirts Kos Gol Lake along the western shore for some distance, then turns northwestward and westward, following the course of the Khua Kem River to a point near its exit at the frontier line, then turns southwestward up the Kemtshik Valley to its headwater, passes through Pakuoshwo, and ends at the boundary line between the Russian and Chinese territories. This line covers a distance of about 1,700 miles.
c. The Suiyuan-Uliassutai-Kobdo Line
This line starts from Suiyuan in the northwestern corner of Shansi, and proceeds in a northwesterly direction across the hilly country into the Mongolian pasture to Tolibulyk, where it crosses the Great Northern Port-Hami line, and the Great Eastern Port-Urga line. After Tolibulyk, it proceeds in a straight line in the same direction passing through Barunsudshi to the capital of Tuchetu. Thence it continues in the same straight line northwestward to Gorida. After Gorida, it follows the caravan road to Kolitikolik where it crosses the Great Northern Port-Urumochi trunk line. From Kolitikolik, the line turns northwestward, then westward and proceeds across many streams and valleys and passes by many small towns to Uliassutai. At Uliassutai, it crosses the B. Junction-Frontier branch of the Great Eastern Port-Urumochi line. After Uliassutai, the line proceeds westward following the trade road, passes through Khuduku, Bogu, Durganor, and Sakhibuluk to Kobdo. Thence the line turns northwestward to Khonga, Ukha, and Clegei, then westward to Beleu and ends at the frontier. This line is about 1,500 miles long.
d. The Tsingpien-Tannu Ola Line
This line starts from Tsingpien at the Great Wall, on the northern border of Shensi, proceeds through the Ordos country by Bonobalgasun, Orto, and Shinchao, and then crosses the Hoangho to Santaoho. From Santaoho, it proceeds across Charanarinula Mountain into Mongolian prairie in a northwesterly direction to Kurbansihata where it crosses the Peking-Hami line, then it goes to Unikuto and Enkin, where it crosses the Great Northern Port-Urumochi line. After Enkin, the line enters into a valley and watered district, proceeds northward to Karakorum, and then turns northwestward across various streams and valleys of the tributary of the Selenga River by Sabokatai and Tsulimiau. After Tsulimiau, it proceeds in the same direction across the Selenga River, follows its branch, the Telgir Morin River, up to its source and crosses the watershed into Lake Teri Nor. Then it follows the outlet of the Teri Nor to the Khua Kem River, where it ends by joining the Kalgan Urga-Tannu Ola line. This line covers a distance of about 1,200 miles.
e. The Suchow-Kobdo Line
This line starts from Suchow in a northwesterly direction penetrating the Great Wall at Chiennew, and proceeds to the coal field, about 150 miles from Suchow. Then it goes to Habirhaubuluk and Ilatoli. A short way from this place the line comes across the Peking-Hami line and then proceeds to Balaktai. After this the line passes a bit of pure desert to Timenchi. After entering the hilly and watered country it proceeds to Gaskhiu where it crosses the Great Northern Port-Urumochi trunk line. After Gaskhiun, it proceeds to Wolanhutok, Tabateng, and Tabutu where it joins the Kucheng and Kobdo highway and following it, proceeds to Kobdo, through Batokuntai and Sutai. Here the line ends, covering a distance of about 700 miles.