Is Shentu Company an in-pipe unit or an out-of-pipe unit of the railway?

Railway Administration is a characteristic product of China railway management system and an important part of China railway three-level system. At present, there are 18 railway bureaus (groups and companies) in China, namely:

Beijing Railway Bureau, Chengdu Railway Bureau, Wuhan Railway Bureau, Shanghai Railway Bureau, Shenyang Railway Bureau, Xi Railway Bureau, taiyuan railway administration Railway Bureau, Jinan Railway Bureau, Zhengzhou Railway Bureau, Nanning Railway Bureau, Nanchang Railway Bureau, kunming railway administration, lanzhou railway administration Railway Bureau, Harbin Railway Bureau, Hohhot Railway Bureau, Urumqi Railway Bureau, Guangzhou Railway Group and Qinghai-Tibet Railway Company.