What brilliant achievements did the Tang Dynasty make in culture and science and technology?

The policy of opening to the outside world in the Tang Dynasty enabled the Tang Dynasty to maintain extensive and close economic and cultural ties with many countries in Asia and Africa. It has made great contributions to the development of world civilization. Xuanzang, an Indian monk, went to India to learn from the scriptures and promote cultural exchanges between China and India. The Tang Dynasty also made brilliant achievements in culture and science and technology. Jia Dan, a writer and geographer, Sun Simiao, a pharmacologist, Liu Zhiji and Du You, historians, Liu Zongyuan, Han Yu and Liu Yuxi, painters Yan and Wu Daozi, calligraphers, Chu Suiliang, Liu Gongquan, Yan Zhenqing, great poets Li Bai and Du Fu, and many other celebrities came forth in large numbers. Poetry in the Tang Dynasty has a prominent position in the history of China literature, and the diversity of styles and schools is unmatched by the previous generation. The invention of block printing is one of the main technical achievements in the Tang Dynasty.