1, Emperor Kangxi, Kangxi also initiated the Chinese translation of equation terms such as "yuan", "times" and "root". When ferdinand verbiest, a Belgian missionary, explained the equation 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 that the unknown be translated into yuan, and the highest number into times, so that the values of the unknown equal to the left and right sides of the equation can be translated into roots or solutions.

2. 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 studied teaching for decades, and neither teachers nor students have ever seen anyone willing to think like you!" " These equations created by Kangxi are simple, accurate and scientific, and are very easy to understand and remember.