in fact there's hardly any meal without meat. 23-year-old li yang is very self critical. : i didn't eat healthily at home -- much too irregularly, actually, whenever i was hungry. here, there are just three meals a day and that's good. reporter: the battle against the kilos is also often an internal struggle. jia: of course sometimes children try to smuggle in extra food. not because they're hungry, but because their bad habits are so strong. that's why we have surveillance cameras everywhere and there are always instructors on site. reporter: changing bad habits. that's also the goal of the exercise program. four to six hours a day, only sunday afternoons are free. li yang has been following this intense schedule for three weeks now. the trainer asks how many she can do li yang answers, about 20. she is among those who are here on their own initiative. she has just completed her studies and wants to look for a job. but first she needs to lose 30 kilos she says, in order to improve her chances. she's already lost 17. li: i think i'm too fat, i can't buy any nice clothes an