Difficulties encountered: obstruction by foreign countries, lack of technical personnel, arduous tunnel project and steep railway slope;

He is not afraid of ridicule, danger and difficulty, accurately surveyed the line, and adopted the following methods: Both ends were drilled into the middle at the same time, using the middle drilling method, leading the way and rushing to work, and designing a "herringbone" line.

Experience Zhan Tianyou’s intelligence, bravery and perseverance, as well as his patriotism.