This line starts from Sian and runs northward to Sanyuan, Yaochow, Tungkwan, Yichun, Chungpu, Foochow, Kanchuan, and Yenan, where it meets the Great Eastern Port-Uliassutai line. From Yenan, it turns northeastward to Suiteh, Michih, and Kiachow on the right bank of the Hoangho. Thence it runs along the same bank to the junction of the Weifen River with the Hoangho (on the opposite side), where it crosses the Hoangho to the Weifen Valley and proceeds to Singhsien and Kolan, there crossing the Great Eastern Port-Urga line. From Kolan, it proceeds to Wuchai and Yangfang, where it crosses the Great Wall to Sochow and then Tatung there meeting the Peking-Suiyuan line. This line is about 600 miles long. It passes through the famous oil field in Shensi, and the northern border of the northwestern Shansi coal field. At Tatung, where it ends, it joins the Peking-Suiyuan line and through the section from Tatung to Kalgan it will connect with the future Northwestern System which will link Kalgan and Dolon Nor together. g. The Sian-Ninghsia Line This line will start from Sian in a northwesterly direction to Kingyanghsien, Shunhwa, and Sanshui. After Sanshui, it crosses the Shensi border into Kansu at Chengning and then turns west to Ningchow. From Ningchow, it follows the Hwan Valley along the left bank of the river up to Kingyangfu and Hwanhsien, where it leaves the bank and proceeds to Tsingping and Pingyuan, where it meets the Hwan River again and follows that valley up to the watershed. After crossing the watershed, it proceeds to Lingchow, then across the Hoangho to Ninghsia. This line covers a distance of about 400 miles and passes through a rich mineral and petroleum country. h. The Sian-Hankow Line This is a very important line connecting the richest portion of the Hoangho Valley with the richest portion of the central section of the Yangtze Valley. It starts from Sian on the track of line (a), crosses the Tsingling and descends the Tankiang Valley as far as Sichwan. At this point, it branches off southward across the border into Hupeh, and following the left bank of the Han River, passes Laohokow to Fencheng, opposite Siangyang. After Fencheng, it follows continuously the same bank of the Han River to Anlu, thence proceeding in a direct line southeastward to Hanchwan and Hankow. This line is about 300 miles long. i. The Sian-Chungking Line This line starts from Sian almost directly southward, crosses the Tsingling Mountain into the Han Valley, passes through Ningshen, Shihchuan, and Tzeyang, ascends the Jenho Valley across the southern border of Shensi into the province of Szechwan at Tachuho. Then crossing the watershed of the Tapashan into the Tapingho Valley, it follows that valley down to Suiting and Chuhsien. Thence it turns to the left side of the valley to Linshui and follows the trade road to Kiangpeh and Chungking. The entire distance of this line is about 450 miles through a very productive region and rich timber land.