Which jobs in Hohhot Metro are outsourced to CRRC?

Subway security, security inspector, cleaning. The subway company is very big, and some jobs are too busy to be outsourced. Many jobs assigned by the MTRC must be outsourced. For example, cleaning in subway stations, engineering maintenance, rail maintenance and sanitation, maintenance and maintenance of underground cables, security, ticket recharge, security check and many other work contents, the types of work carried out by subway companies are divided in detail, and this kind of outsourcing can be done better.