Your current food intake will not gain weight, but it feels like you are dieting and won't gain weight. If you are thin and want to gain weight, you need to eat protein and other foods while exercising, such as chicken breast (boiled), beef (boiled), fish, protein powder and eggs. If you are afraid of being fat, use less oil, use less salt, or don't put it. If it is only for plasticity, the requirements can be relaxed appropriately.