Mandatory. Catering industry gas safety can not be ignored, it is related to the safety of life. Nantong City store bottle to tube is mandatory, 2022, within the city limits of the catering business households are to convert bottled liquefied petroleum gas into pipeline natural gas or electricity, while the requirements of the catering store operators, must strengthen the daily inspection work. Bottled gas sales must implement the real name system, the use of gas in catering establishments to implement the bottle to pipe.