Yang Zongwei's song 'Liangliang' is characterized by a deeply emotional tone that resonates with listeners. The song's tone is marked by a blend of melancholy and longing, which is evident in the lyrics and melody. The lyrics, written by Yang himself, convey a sense of nostalgia and the bittersweet nature of memories. The melody, composed by Yang, complements the lyrics with a hauntingly beautiful tune that captures the essence of the song's emotional depth.

The emotional tone of 'Liangliang' is further enhanced by the use of traditional Chinese musical elements, such as the guzheng (a plucked zither) and erhu (a two-stringed bowed instrument), which add a layer of cultural richness to the song. These instruments are often associated with expressing sorrow and longing in Chinese music, which aligns perfectly with the song's theme.

Data from music streaming platforms and surveys indicate that 'Liangliang' has been widely appreciated for its emotional impact. On platforms like Spotify and Apple Music, the song has received high user ratings and has been frequently added to playlists focused on emotional and introspective music. Additionally, fan surveys and social media discussions have shown that many listeners find the song to be a powerful expression of their own emotions, particularly related to love and loss.

The emotional tone of 'Liangliang' is a testament to Yang Zongwei's ability to connect with his audience on a deeply personal level. By combining traditional Chinese musical elements with contemporary songwriting, he has created a piece that transcends cultural boundaries and speaks to the universal human experience of love and loss. The song's enduring popularity is a testament to its emotional resonance and the timeless quality of its message.