Act according to your own nature: Act according to your own nature.
Spontaneity: following its nature; Be willful. Temperament; Nature. Simple; It's simple.
Happy-go-lucky: a China idiom, pronounced as sui yi ê r ā n. It means being able to adapt to the environment and be satisfied under any circumstances. There is also a feeling of being stuck in a rut and afraid to change.
This sentence has no allusions, and it is similar to the motto written by modern people.