Introduction to Zhengyangmen Pavilion: The exhibition content of Zhengyangmen Pavilion of China Railway Museum is "History of Railway Development in China". The exhibition outline strictly follows the development trajectory of China's railways over the past 130 years, and divides the exhibition into five stages. It uses a large number of detailed and vivid picture historical materials to comprehensively display the historical trajectory of China's railway development and provide visitors with an in-depth understanding of China's railways. The past, present and future also provide precious historical materials and important basis for the historians to study railway history.