"There are many components to our country's railway system, with diverse departments and enterprises, including large state-owned railway companies, mining companies' self-built railways, urban railways, regional railways, other types of enterprise-specific railways, dedicated agricultural railways, and more."
"The main characteristics are the numerous small and large railways, the significant management challenge, and the difficulties in integrating these railways into a network. The national trunk railway network is relatively manageable, but the problem lies primarily in the smaller railways, direct railways, and their lack of tight connection with the trunk railways."
"Among them, the mining railways are the most typical, with their construction restricted by resource distribution, especially severe in the southern and central regions."
