Source: Manip was made によって Deviantart user lonewolf-sparrowhawk at my request
Pre-canon( few years before events of Mulan). It's Ling 16th birthday. 16th and the first one he celebrates without his father who died 2-3 weeks before. Ling ロスト his appetite.Yao tries to comfort Ling and convience him to eat a bit.