Zhang Heng (1978–139)
Zi Pingzi was a native of Nanyang County, Eastern Han Dynasty (present-day Nanyangshi, Henan). Astronomer, mathematician, inventor, geographer, writer. Known as Kesheng. He pioneered the study of astronomy and geography in China and invented the ground motion instrument.
Liu Hong (c. 129–210)
Ziyuan Zhuo, a native of Taishan County (present-day Linyi City, Shandong Province) in the Eastern Han Dynasty, was an outstanding astronomer and mathematician, inventor of abacus and discoverer of the theory of the inhomogeneity of lunar motion, and was revered as a "sage of arithmetic". His book , The Dry Elephant Calendar , was the first calendar handed down to mankind to introduce the theory of the unevenness of lunar motion. The length of the lunar eclipse regression year is set at 365.2462 days, and the measured length of the near point moon is very different from the current measurement. Invented the "positive and negative abacus", is the early founder of "abacus" and the father of abacus.
He Chengtian (370–447)
A native of Tan County, Donghai County, Song Dynasty (present-day Tancheng County, Shandong Province), he was a thinker and astronomer. Its theory of circumference and the distance between the poles is equivalent to giving an approximation of Pi of about 3.1429, which has a great influence on the later calendar. His representative works are "The Theory of Da Sex" and "Book of The Patriarchs".
Zu Chongzhi (429–500)
Zi Wenyuan (字文遠), a native of Fanyang County (遒县, in modern Laishui County, Hebei Province) during the Southern and Northern Dynasties, was a mathematician and astronomer. For the first time in mathematics, "pi" was actuarially calculated to the seventh decimal place. The Great Ming Calendar was the most scientific and progressive calendar of the time. Invented or created water mills, guide cars, thousand mile boats, timers.
Li Chunfeng (602–670)
A native of YongXian County, Qizhou, Tang Dynasty. Astronomer, mathematician, Yi scholar, Taoist. The first person in the world to grade the wind. His book "Yi Wei Zhan" is the earliest monograph in the history of world meteorology.
Su Song (1020–1101)
Zi Rong, a native of Quanzhou (present-day Xiamen), Fujian Road, northern Song Dynasty, was an astronomer, astronomical machinery maker, and pharmacist. He was a member of the Imperial Household And guanwendian university. The leader made the world's oldest astronomical clock "Water Transport Instrument Observatory". For his outstanding contributions to medicine and astronomy, he is known as one of the greatest naturalists and scientists in ancient And Medieval China. His representative works are "Bencao Tujing", "New Yixiang Fa", and "Su Wei Gongwen Collection".
Shen Kuo (1031–1095)
Zi Cunzhong, a native of Qiantang County, Hangzhou, Northern Song Dynasty (present-day Hangzhou, Zhejiang), was a scientist. He has deep achievements and outstanding achievements in many disciplines and fields, and is known as "the most outstanding figure in the entire history of science in China". The "Mengxi Pen Talk" created by him has been called "a milestone in the history of Chinese science". He founded gap accumulation and circle technique, discovered magnetic declination angle, improved armillary instrument, and revealed resonance phenomena.
Guo Shoujing (1231–1316)
Word Forsyth. A native of Xingtai (邢台, in present-day Xingtai, Hebei) during the Yuan Dynasty. Astronomer, mathematician, and hydraulic engineering expert. Studied under Liu Bingzhong and Zhang Wenqian. The Chronological Calendar, formulated with Xu Heng, Wang Ke and others, was the most advanced calendar in the world at that time, and twelve new instruments such as simple instruments and high tables were invented. The representative works are "Pushing Step" and "Li cheng".
Xu Guangqi (1562–1633)
Zi Xian, xuan hu, was a native of Fahuahui (present-day Shanghai) in Shanghai County during the Ming Dynasty. Astronomer, mathematician, politician. Shōshū of the Ministry of Ceremonies and a fellow of the BunkyōKaku University, and a second assistant to the Cabinet. Studied under Matteo Ricci. Committed to the research of science and technology, it is an active promoter of introducing and absorbing European science and technology.
Song Yingxing (1587–?) ）
Zi Chang Geng, a native of Fengxin County (present-day Fengxin County), Jiangxi during the Ming Dynasty, was a scientist. Committed to scientific investigation and research on agricultural and handicraft production. His sense of foresight made him a critical thinker of feudalism and the medieval academic tradition. His creation of "Tiangong Kaiwu" is known as "China's 17th Century Craft Encyclopedia".
Xue Fengzuo (1599–1680)
Zi Yifu (字宜甫), courtesy name Jizhai (号寄斋), was a native of Yidu (present-day Zibo), Shandong during the Ming and Qing dynasties, an astronomer and mathematician. His works "Taiyin Sun Laws" and "Seeking The Age", the operation law of the sun, the earth, the moon, the ecliptic, equatorial angle, have been observed and calculated on the ground, and the time and time of the earth's circumference around the sun is only 13 minutes and 37 seconds; the rotation speed of the sun is also measured; and the operation law of wood, fire, and earth are also studied and incisively analyzed. The mathematical work "Proportional Logarithm Table" is the earliest "logarithm" monograph in China.
Zou Boqi (1819–1869)
During the Qing Dynasty, he was a native of Guangzhou Prefecture (present-day Foshan City), Guangdong Province, and the characters Yilu, Tefu, and Zhengjun. Physicist and scholar. Made a camera, known as the "father of Chinese cameras". He has manufactured telescopes, microscopes, seven political instruments, etc. He was the first person to study modern ink studies and created his own mapping method.
(Image from the Internet)