Zhang Heng
A famous astronomer who invented the intricate seismometer and the first water-powered armillary sphere in the world.
Zu Congzhi
A mathematician and astronomer who developed an estimation for pi.
Li Daoyuan
A geographer who wrote a book on the ancient geography of China.
Shen Kuo
He was the first to describle the magnetic needle compass and the concept of magnetised material pointing to the true north 400 years before Europe.
Guo Shoujing
He deducecd there are 365.425 days in a year and made improvemetns to astronomical instruments.
Xu Guangqi
He did one of the first trestises on agriculture and translated western text to Chinese.
Song Yingxing
He wrote an encyclopedia on a range of techncial subjects including the use of gunpower.
