Most of the bulk edible oil in containers has no packaging label, and it is a "three noes" product with no factory name and address, no production date and shelf life and no quality standard. There are serious health risks, so don't buy it. In particular, it is unacceptable to buy a large amount of cooking oil at one time. This is because, first of all, the oil is generally stored in the kitchen, with high temperature and high humidity, which is easy to breed bacteria; Second, the oil in the oil is prone to oxidative rancidity, which will increase the risk of cancer.