怅然自失

Explanation: Sense of loss: not because of unsatisfactory feel happy. Described the confusion, like what looks like a lose. Southern Song Liu Yiqing "Shi magnanimity": "Yin from the loss of a sense of loss." Qing Pu, "Strange Tales of cattle songjang": "Zhong Qi Su father's name, owner ~." 　　Source: Southern Song Liu Yiqing "Shi magnanimity" Yin sense of loss from the loss. " 　　Examples: Zhong Qi Su parent name, owner ~. ★ Qing Pu, "Strange Tales of cattle songjang"