Please tell me what a plumber does on a construction site. Please be specific, thank you!

Water: mainly the installation of water supply and drainage fire pipes. Electrical aspects: mainly the installation of strong current and weak current. Strong electricity includes lighting, pre-embedding, secondary piping, and weak electricity is TV and telephone. Including a wide range, but also very miscellaneous. If you can weld and wind, it will be very easy to find a job. I think it is difficult to be an all-round person without five or six years of work experience.