China from Fengtai to Zhangjiakou via Juyongguan, Shacheng and Xuanhua. The total length is 201.2km. It is now the first paragraph of beijing-baotou railway. The Jing-Zhang Railway was established in September 1905 and opened to traffic in August 1909. At that time, Zhan Tianyou was appointed as the chief engineer of the Jing-Zhang Railway Bureau by the Qing government (later became the general manager of the Jing-Zhang Railway Bureau). Railway engineering is arduous, for example, the terrain from Juyongguan and Badaling to the south exit of Kangzhuang is complicated. In order to cross the steep ravine of Dujun Mountain in Yanshan Mountains, 3.3% ramps and zigzag lines were adopted in the 22km section, and four tunnels were excavated, of which Badaling tunnel was 109 1m long.

The Jing-Zhang Railway is a railway that is hosted by Zhan Tianyou and successfully built to connect Beijing and Zhangjiakou. It is a railway funded, surveyed, designed and constructed by China itself, with a total length of more than 200 kilometers. This road "is separated by high mountains and mountains, with the most masonry, and the bridge is more than 7,000 feet, so it is difficult to find other places", especially "Juyongguan, Badaling, with many mountains and many stone bays, the roads that have been built in various provinces are the most difficult, that is, Taixishu also regards such projects as extremely difficult". "From Shannankou to Badaling, the height difference is 180 feet, and it must be increased by one foot every forty feet." After the news of China's own Beijing-Zhangjiakou Railway came out, foreigners sarcastically said that the China engineer who built this railway probably hasn't been born yet. Zhan Tianyou bravely shouldered the arduous task of chief engineer and encouraged engineers to win glory for our country. He personally led the engineering team to survey and determine the route, and selected the route currently passing through Nankou, Juyongguan and Badaling from the three surveyed routes. Zhan Tianyou, together with railway workers, overcame difficulties such as lack of funds, shortage of machines and weak technical force, successfully completed two difficult tunnel projects, Juyongguan and Badaling, and erected herringbone tracks. Beijing-Zhangjiakou Railway 1905 started in September, and was completed in August, 909, two years ahead of schedule, with a fund balance of 282,000 silver, and the total cost is only one-fifth of that of foreign contractors in the past, which can be described as low cost, good quality and quick completion. In the face of hard facts, foreigners can't help but be impressed. Jing-Zhang Railway is the first railway trunk line designed and built by China people themselves, which is the glory of China people and China engineering and technical circles, and also the victory of China people's anti-imperialist struggle in the modern history of China.