Among Han Zong's roommates, soldier Song Jia desperately reduced his weight from 53.5 kg to 47.5 kg in two weeks in order to participate in the competition. Ga-Yeon Song basically uses it to sleep during the day, so three meals will be divided into lunch, dinner and snacks. Finally, besides drinking water, Ga-Yeon Song also mentioned that he would drink more coffee, which can achieve diuretic effect, thus achieving slimming effect.