Zhang Heng: A scientist and writer in the Eastern Han Dynasty, from Nanyang, Henan. In astronomy, he changed the theory of "covering the sky", put forward the theory of "Huntian", drew a star map and invented "Huntian Instrument" and "Seismograph".
Zhang Ling: A native of Fengxian County, Jiangsu Province, founded the "Five Mi Dou" (Taoism) religion in guanxian, Sichuan Province at the end of the Eastern Han Dynasty, which was called Zhang Tianshi.
Zhang Zhongjing: A physician in the Eastern Han Dynasty, a native of Zhenping, Henan. Diligently seeking the ancient method, learning from others' strengths, and writing Treatise on Febrile Diseases, which benefited the people, was respected as a medical sage by later generations.
Zhang Sui: An astronomer in the Tang Dynasty, a native of Nanle, Henan Province. He is the first person in the world to measure the meridian. Zhang Xu: A great calligrapher in the Tang Dynasty, a native of Suzhou, Jiangsu. He was a heavy drinker. Every time he got drunk, he shouted "Go crazy" and then wrote. His escape was amazing and he was called "Cao Sheng".
Zhang Jingyue, a native of Shaoxing, Zhejiang Province, was a Chinese medicine theorist in the Ming Dynasty. He expounded the theory of TCM, which played an important role in the development of TCM theory. Zhang Decheng: At the end of the Qing Dynasty, the people of China fought against the Boxer leaders in the Eight-Nation Alliance.