Brother, you don't have to eat beef all the time if you want to gain muscle. You can still guarantee the supply of protein by living on campus now. Breakfast: two eggs, two steamed buns, two bowls of porridge, eat more tofu or dried tofu and cold dishes; Lunch: pork or fish, bean products, steamed bread, vegetables; Dinner: steamed bread, pork or fish, bean products and vegetables; Snack: a steamed bread and a bag of milk. You will understand what I mean after watching the catering. You should give priority to steamed bread, bean products are a good supplement to protein, and so is milk. In fact, eating like this is healthy. Eating it will definitely gain lean meat, haha!