How about entering China Railway Tunnel Bureau?

The mechanical future of the Tunnel Bureau is inferior to that of civil engineering.

The income of the Tunnel Bureau is above the average level in the Engineering Bureau (overall, the projects are quite different).

Tunnel Bureau is a mechanical user. Although I make my own shield (actually saving) and formwork trolley (well-known in China), my technical ability is not very strong.

It's very difficult to resign after entering the Tunnel Bureau. All kinds of nominal liquidated damages are equivalent to one or two years' salary (don't tell me about the labor contract law, I have learned more than you, and it's useless to resign).

In the Tunnel Bureau, the income from mixing with the general manager is still considerable, and the average annual income of better projects is around 20w.