If you dare to work hard, I estimate that it is ok to lose 30 pounds in 20 days and lose weight healthily. You can eat two eggs, a bag of milk in the morning and some olives and pumpkins at noon. Remember to cook with clear water, and be sure not to add salt. Make some nutritious meals and add some vitamins. Don't eat at night. If you are particularly hungry, drink boiled water.
Because drinking boiled water will promote your metabolism, but it is best not to drink a lot of water after nine o'clock!
Exercise must keep up, get up at six in the morning and run for an hour, and run for two or three hours at night. If you have time every afternoon, you can go to the gym to exercise and lift barbells. You'd better find a personal trainer and let him work out a series of weight loss methods for you, and then you can try to do it.
Stop all snacks. If you eat snacks, I think it is impossible to lose 30 pounds in 20 days. You should exercise every day as much as possible. I think you can go to work without driving or cycling, which is also a way for you to lose weight.
You should start eating some tomatoes and cucumbers at noon. They are also good for losing weight.
Yoga can be enrolled in yoga classes to lose weight, because yoga is also a very fast-growing thing, and you can also lose weight. You can try to practice it.
In these 20 days, you must keep your mouth shut and take your legs away, otherwise all your efforts will be in vain. I believe that if you really work hard, you will get the result you want!