15 days minus 16 kg? It's not easy. Because the speed of losing weight is fast first and then slow, and there will be a platform period for every 8 kg of weight loss, it is difficult to lose weight no matter how thin. At that time, the weight may continue to decline after a certain period of time. Moreover, fat has memory, and the cycle of losing weight seems to be at least 180 days. 180 days later, it is not easy to rebound. For example, I used to run 10000 meters every day in winter vacation. I ate half a bowl of noodles in the morning, the rest at noon and nothing at night. I don't eat as much as others, and I don't weigh a catty, just because I'm on a platform. The platform period varies from person to person, some are one or two weeks, and some are one or two months. The key is to stick to it, keep it up, and don't return just because you are light enough to achieve your ideal goal, or you will rebound quickly. This is a continuous process.