Why did China's painting and calligraphy art shine brilliantly in Sui and Tang Dynasties?

During the Sui and Tang Dynasties, economic prosperity and political clarity created conditions for the development of culture and art. It is precisely because of the social stability, economic prosperity and enlightened ruling policies of the Tang Dynasty that these created favorable conditions for the development of China culture. In addition, Emperor Taizong himself likes calligraphy very much. He not only ordered people to collect Wang Zhi's ink everywhere, but also regarded the quality of calligraphy as an important criterion for selecting officials. This aroused the enthusiasm of scholars to learn calligraphy, thus raising the calligraphy art of the Tang Dynasty to a very high level. The economic development, political clarity and social stability in the Sui and Tang Dynasties provided objective conditions for painters to visit the great rivers and mountains of the motherland. Some painters painted a magnificent picture of their attachment to the motherland with pens. The painting art in Sui and Tang Dynasties shines brilliantly. Famous painters at that time were Zhan Ziqian in Sui Dynasty, Yan and Wu Daozi in Tang Dynasty.