In oil painting works created by Chang Yu, most of painting subjects are drawn from his familiar life acted as a literati, thus to express his inner feelings and ideals. the background, kept plenty of blank space, with clear lines outlines, simple and concise structure, both can embodies the Freehand context of Chinese Painting and Calligraphy, no matter people, animals or still life, all looming a type of nostalgic sense of loneliness.
Sa langis pagpipinta ay gumagana na nilikha sa pamamagitan ng Chang Yu, karamihan ng mga paksa pagpipinta ay iginuhit mula sa kanyang pamilyar na buhay na kumilos bilang isang mga edukado, kaya upang ipahayag ang kanyang mga panloob na damdamin at ideals. background, itinatago ng maraming blangko, na may malinaw na balangkas linya, simple at maigsi na istraktura, maaari parehong embodies ang konteksto ng kalayaan Intsik pagpipinta at kaligrapya, kahit tao, hayop o pa rin buhay, lahat ng looming isang uri ng nostalhik pakiramdam ng kalungkutan .