When do the structural technicians of Fuzhou Metro not work at night?

I can't. Fuzhou Metro Structural Technician produces grass-roots posts in the first line of subway operation, requiring four shifts and two shifts 24 hours a day. They often carry large equipment and work high above the ground, so they have to work at night. Metro structural technician is the technical director. As the most basic component of every construction unit, it is indispensable.