hello, it's my pleasure to answer your questions. 1. Qualified gas cylinders provided by supply enterprises that have obtained gas business license and gas cylinder filling license shall be used, and expired or scrapped cylinders shall not be used; Cylinders without warning marks and filling marks shall not be used. (Liquefied gas cylinders generally have a service life of 8 years, and should be inspected regularly every 4 years. ) 2. It shall sign a safe gas supply contract with the liquefied petroleum gas supplier, establish a ledger, and keep a gas purchase certificate after each gas purchase. The gas purchase certificate shall accurately record the cylinder registration code. 3. It is forbidden to place liquefied gas bottles in dining places; Places where liquefied gas cylinders are used are strictly prohibited from being in the same building as residential buildings. 4. The combustible gas alarm device should be installed in accordance with the newly revised "Safety Production Law" and its normal use should be guaranteed; Equipped with dry powder fire extinguishers and other fire fighting equipment. I hope my answer is helpful to you!