2. The word Yuanhe in the mathematical equation was founded by Emperor Kangxi of the Qing Dynasty in China. Emperor Kangxi is a famous, ambitious, intelligent and studious emperor in the history of China. In addition to his literary martial arts, he also likes mathematics very much.

3. When ferdinand verbiest, a Belgian missionary, explained the equations to Kangxi, because his proficiency in Chinese and Manchu was very limited, some terms were unclear, and it was meaningless to explain them for a long time. Kangxi suggested translating the unknowns into yuan, the highest number into times, and the values of the unknowns on the left and right sides of the equation into roots or solutions.

4. Ferdinand ferdinand verbiest stared at Kangxi in disbelief, paused for a moment, and suddenly embraced Kangxi according to the most cordial etiquette in the West. He said excitedly, "I have been studying teaching for decades, and I have never met anyone who is willing to think like you." These equations created by Kangxi are simple, accurate and scientific, and are very easy to understand and remember.