Leibniz in the west was a German scientist and philosopher in the17th century. He and Newton are both founders of calculus. 1673, Leibniz made a calculation tool in Paris, which can perform addition, subtraction, multiplication, division and square root operations.

170 1 year, Leibniz learned about China's Book of Changes when he met with French missionary Bowett in China, and got the eight diagrams and sixty-four hexagrams of Zhouyi from the missionaries. At that time, mathematicians were studying binary. Inspired by Yi Tu, he realized the true meaning of binary numbers.

1703, inspired by China's classic Book of Changes, Leibniz wrote a paper on binary arithmetic, which was published in the Proceedings of the Royal Academy of Sciences. Binary operation is the foundation of epoch-making electronic computer. So Leibniz wrote excitedly to Emperor Kangxi of China at that time, asking for China citizenship. In order to express his admiration for the Book of Changes, he also founded a China College in Frankfurt.