I m a plumber, and how much should I charge the project manager for a toilet shift

No; Toilets and sinks, either the merchant sent someone to install them, or they found someone to install them themselves.

There's nothing wrong with it, there's nothing wrong with you not minding.

There is an app called 58 Daojia, which seems to have a plumber coming to the door, and you can also look for it in WeChat. Generally, factories, construction sites, shopping malls and community property engineering departments have plumbers, as long as they give money.

It's a matter of sewers, you can buy a floor drain to prevent bad smell, just install it, and bricklayers and plumbers have little to do with it.

There is an app called 58 Daojia Dan, which seems to have an electrician coming to the door, and you can also look for it in WeChat. In general, factories, builders have no construction sites, shopping malls and community property engineering departments, and there are many home appliance repair shops, and lamp shops have electricians, as long as they give money. The first one.