You can use beef to stir-fry green peppers, beef to stir-fry Flammulina velutipes and beef to stir-fry kale. . . . . . The beef is hot. If you eat too much, it will be slightly toxic, that is, you will get acne or something. It's not that serious. Just don't eat every day. Rub the beef with starch and a little cooking oil before frying, so that the fried beef is tender and can't be fried for too long, and it will become tough. Stir-fry until there is no blood, just turn it over a few times ~