1, Rolling
Zhang Heng (78 ~ 139) is an outstanding astronomer, mathematician, architect and literary master. In the Eastern Han Dynasty, he was almost an all-rounder in ancient times and was known as the "Wood Sage". In mathematics, Zhang Heng left a book "On Calculation", in astronomy, there are "Lingxian Hunyi Illustration", in addition, there are dozens of books handed down from literary poetry collections.
2. Zu Chongzhi
Zu Chongzhi (429 ~ 500) was an outstanding mathematician, astronomer and inventor in the Southern and Northern Dynasties. Zu Chongzhi's most well-known achievement is that he calculated 24,576 polygons by using the secant method, and the pi was accurate to 3. 14 15926 to 3. 14 15927. It took 1000 years for this achievement to be broken by Arab mathematician Al Cassie.
3. Guo Shoujing
Guo Shoujing (1231~1316) was a famous astronomer, mathematician and water conservancy engineer in Yuan Dynasty. Guo Shoujing has been diligent and studious since he was a child, and he has strong hands-on ability. He used the optical principle to invent and improve the tools used by predecessors to observe celestial phenomena, such as simple instrument, vertical instrument, high instrument, armillary sphere, exquisite instrument, waiting instrument, looking up instrument and so on. , the China ancient practical technology development to the extreme.
4. Cai Lun
Cai Lun was born in Guiyang County in the Eastern Han Dynasty. Cai Lun summed up people's paper-making experience in the past, innovated the paper-making technology, and finally made "Cai Hou Paper". In the first year of Yuanxing, it was reported to the imperial court, and Han and Emperor ordered the popularization of his papermaking method. Cai Lun's papermaking was listed as the "Four Great Inventions" in ancient China, which made outstanding contributions to the spread of human culture and the progress of world civilization.
5. Luban
Lu Ban, Ji surname, Gong Bo surname, same name. Also known as public loss, public loss, class loss, Lu style. Lu people in the Spring and Autumn Period. After about 450 BC, he came to Chu from Shandong to help Chu make weapons. Hand tools used by carpenters, such as drills, planers, shovels, rulers and Mo Dou, are said to have been invented by Lu Ban.
The above contents refer to Baidu Encyclopedia-Luban Baidu Encyclopedia-Cai Lun.