Throughout his life, Yang San-lang has been devoted to impressionism. He focuses on outdoor sketching and the variation of light and shadow in sunshine and at different times of the day. Highly renowned among "senior artists" in Taiwan, Yang San-lang spares no efforts to promote the development of art. He established the Tai-Yang Fine Arts Association, and was granted the National Order of Culture, the supreme glory in the Taiwan art world. Among all the well-known Chinese world masters, Yang San-lang is unparalleled for his acuity in grasping the transient, touching, and dynamic moments of nature, his deployment of spatial hierarchy, and ability in expressing rich and profound emotions in his artistic work.

From his mid life, Yang San-lang's works have focused on nature, especially landscapes of forest and mountain, which have become his artistic realm. "Sunny Mount Jade" represents the artist's pursuit and exploration of the "origin of art". Each brush stroke depicts the time sequence and the interweaving light and shade of sunshine in Jade Mountain, playing the simple, straightforward, rigorous and sophisticated rhythm of harmony in the waving curves of the mountain.