Waste oil, the source of chicken may be problematic, and you know the disadvantages of waste oil. Even if waste oil is not used, it is impossible for roadside stalls to change oil according to the standard. That kind of oil is often used continuously, and it becomes something like gutter oil without change. Eating too much will cause cancer in the most serious way. Eat less fried food. At present, no domestic oil is changed on time according to the standard, including KFC and McDonald's.