Isn't there a cupboard in Beijing where gas can be turned on?

There are no cabinets in Beijing to turn on the gas. As long as there is a time difference, don't install natural gas yet. When natural gas pipeline is ventilated, it needs to be tested. When installing the cabinet, the natural gas pipeline should be removed and reinstalled, and it should pass through the cabinet. This is even more troublesome, and there is a risk of air leakage. There is no way to measure whether it leaks. Try to install the cabinet first.