It took me 40 days to lose weight from 70kg to 60kg. My method is: breakfast is normal, lunch rice is halved to eat more vegetables, dinner is replaced by oat soybean milk, and I will eat some fruits, mainly apples, in the afternoon. Stick to this for half a month, and then dinner will be lunch. I didn't exercise, because I couldn't keep going, hee hee. If the landlord doesn't like sports, don't try a lot of sports rashly, or he will lose weight and rebound. Now I've lost a year, eating is normal, and I steal snacks. My weight has been maintained at around 6 1KG. The above is for reference only.