This is the third line that radiates from the railway center and proceeds nearly in a westerly direction across the plain to Taonan where it crosses the projected Aigun-Jehol line (Japanese), and also meets the termini of two other projected lines, the Changchun-Taonan and the Tsengkiatun-Taonan (Japanese). After Taonan, the line turns more southward by skirting along the foothills of the southeastern side of the Great Khingan range where vast virgin forests and rich minerals are found. Then it passes through the upper Liaoho Valley formed by the Great Khingan Mountain on the north, and the Jehol Mountain on the south and through the towns of Linsi and Kingpang to Dolon Nor, where it meets the trunk line of the Northwestern Railway system. This line covers a distance of about 480 miles, a greater part of which is on level land. d. The Tungchin-Kerulen Line This is the fourth line that radiates from the Tungchin Railway center. It runs in a northwesterly direction almost parallel with the Harbin-Manchuli line of the Chinese Eastern Railway, the distance between the two lines varying from 100 to 130 miles. The line starts from Tungchin on the north side of the junction of the Nonni and Sungari rivers and proceeds westward across the Nonni River to Talai, and then turns northwestward across the plain into the valley of the north branch of the Guileli River. After entering the valley, it follows the stream up to its source, then crosses the Great Khingan Mountain watershed into the Mongolian Plain by the Khalka River, and follows the right bank of this river to the north end of Bor Nor Lake. Thence it turns directly westward to the Kerulen River, and follows the south bank of the river to Kerulen. This line covers a distance of about 630 miles. e. The Tungchin-Moho Line This is the fifth line that radiates from this railway center. It starts from the north side of the junction of the Nonni and Sungari rivers, and proceeds northwestward across the northern end of the Great Manchurian Plain to Tsitsiha. At Tsitsiha, it joins the projected Kinchow-Aigun line and proceeds together northwestward alongside the left bank of the Nonni River as far as Nunkiang where it separates from the other. Thence it resumes the northwesterly direction and proceeds into the upper Nonni Valley until the headwater is reached. Then it crosses the northern extremity of the Great Khingan Range to Moho, where it joins the terminus of the Dolon Nor-Moho line. This line is about 600 miles long. About a quarter of this length runs on the plain, the second quarter runs along the lower Nonni Valley, the third along the Upper Valley, and the fourth runs in mountainous but gold-bearing regions, where only physical difficulties are to be expected. f. The Tungchin-Korfen Line