The practice is as follows:

250g beef, mango 1 piece, half onion, half red pepper, egg white 1 piece, tomato sauce 1 spoon, a little black pepper, starch, salt, wine and soy sauce. Cut beef into strips, marinate with wine, salt, egg white and starch for about 0/0 minute, cut onion and red pepper into strips, peel and cut mango, drain beef after oiling, stir-fry onion and red pepper with a little oil, add beef, add soy sauce, tomato sauce and black pepper, mix well, and finally add mango and stir-fry.