Literature Reference: 古人唱歌兼唱情，今人唱歌唯唱声。—— 《问杨琼》 白居易 The ancients sang with both voice and emotion, while modern people sing only with sound. Source from 'Asking Yang Qiong' by Bai Juyi.
唱: Singing. Vocal style.
情: Emotions and circumstances. The psychological state of emotional fluctuations induced by external events and situations.
Meaning: Singing with heartfelt emotion, expressing deep feelings and sincerity.