Zhan Tianyou often encourages the staff to say, "Our work must be accurate first, and we can't be a little sloppy. The words' probably' and' almost' should not come from the mouth of engineers. " He personally took students and workers, carried benchmarks and theodolite, fixed points on the cliff, surveying and mapping. The Great Wall is often howling with strong winds and yellow sand all over the sky. If you are not careful, you are in danger of falling into a deep valley. No matter how bad the conditions are, Zhan Tianyou always insists on being in the wild. Measuring the route, at night, he draws and calculates under the oil lamp. In order to find a suitable route, he often asks local farmers. When encountering difficulties, he always thought: This is the first railway built by China people themselves, and it must be built; Otherwise, it will not only make foreigners laugh, but also make engineers in China lose confidence.