Why did landscape poetry, landscape painting and geomantic omen flourish after the Six Dynasties?

During the Wei and Jin Dynasties, some literati were dissatisfied with the current situation and avoided mountains and forests. Especially after the Southern Crossing in the Jin Dynasty, the beautiful landscape in the south of the Yangtze River attracted many literati, and the painting of Moshan became a way for painters to express their thoughts and interests. Dai Kui and Gu Kaizhi both painted landscape paintings.

Although the Six Dynasties were precarious, the rulers were still addicted to drinking and having fun, and talked about ostentation and extravagance after their death, refusing to give up the royal luxury. Coupled with the prevalence of Buddhism and Taoism and the influence of the concept of "regarding death as life", building a "home after death" for oneself has become the primary political issue. They built many huge imperial tombs and tombs near Jiankang (now Nanjing, Danyang and Jiangning). The rulers of the Six Dynasties inherited the technique of Kanyu, which began in the Eastern Han Dynasty, chose the burial place and paid attention to "looking at the sky" and "geomantic omen". The general location should be "backed by mountains and facing the plain". This system directly influenced the tomb system in Tang, Song, Yuan and Ming Dynasties.