China's railway transportation began with the Shanghai-Songhu Railway in the late Qing Dynasty. As of the end of 2021, the total mileage of railways in mainland China has exceeded 150,000 kilometers, and it has the second largest railway network in the world after the United States. Among them, the high-speed railway system has exceeded 40,000 kilometers, making it the largest high-speed railway system in the world. Bloggers will record and share China's railway operations in various forms.