This song "Tree Reading" was written by Huang Junlang, a famous lyricist who has collaborated with Jay Chou, SHE, Jolin Tsai, and Elva Hsiao, and created by Michael Lin, Jay Chou's queen producer. In the creation of this song, Wang Junkai not only participated in the conception and creation of the entire lyrics, but also had many discussions and modifications with senior musicians in order to present a better work. Among the many ideas and choices, the final song title "Shudu" was decided by Wang Junkai himself.

The music style has a light folk feel, and the elegant piano chords seem to hit the listener's heart. It uses trees as a metaphor, music as a carrier, and Wang Junkai's soulful voice interpretation. A brand-new perspective touches the throbbing in people's hearts. Starting from the "heart", enjoy the touch brought by this song with Wang Junkai. The lyrics are in the third person, and very delicately outlines the inner interpretation of a tree. It is not just a tree, but a tree that constantly wants to touch the sky. At the same time, it also wants to protect the soil and provide oxygen to the world without asking for anything. Return, the heart of selfless dedication, the person who understands the heart of this tree hopes to continue the tree's wishes and the tree's spirit, and realize what he once wanted but failed to achieve.