Zhu Zaiyu invented the law of twelve averages, and the calendar of Ming Dynasty often made mistakes. Zhu Zaiyu presented a perpetual calendar. what do you think?

Zhu Zaiyu is the ninth grandson of Zhu Yuanzhang, the founder of Ming Dynasty. His father, Gong Zheng Wang Zhu Houan, is proficient in music and music. Zhu Zaiyu is deeply influenced by his father and likes music and math. He is clever and clever, and his elders like him very much.

At the age of ten, Zhu Zaiyu began to study history books such as Shangshu Pan Geng. Later, he was made a prince and became the heir of King Gong Zheng.

King Zhu Houan of Gong Zheng is honest. He wrote to Emperor Jiajing to advise him not to take Dan medicine again, which made Emperor Jiajing furious.

As a result, Gong Zheng was banished to Shu Ren, sent to the Zongren House and imprisoned in a high wall. Zhu Zaiyu and his family fell into a panic.

Zhu Zaiyu, who was still young at that time, was unable to resist the emperor's decision, so he had to build an earthen house outside the palace and live alone to show his dissatisfaction.

Despite his hard life, Zhu Zaiyu still read the Thirteen Classics and a large number of books on music, law and arithmetic in the Ming Dynasty.

After Emperor Qin Long ascended the throne, he released Gong Zhengguo, who had been imprisoned for many years. Zhu Zaiyu choked up and said, "Father, you have suffered."

In this way, Zhu Zaiyu ended his life and study in a mud house and moved back to his hometown to live with his family.

Under the guidance of his father, Zhu Zaiyu made rapid progress in music, and his extraordinary intelligence and calm attitude were praised by King Gong Zheng.

In order to solve the calculation problem when creating the law of twelve averages, Zhu Zaiyu pondered for a long time and invented a super-large abacus with 8 1 file.

Then, Zhu Zaiyu made a square calculation with a big abacus. Its heavy workload discouraged ordinary people, while Zhu Zaiyu enjoyed it.

In this process, Zhu Zaiyu discovered the law of twelve averages, the first term, the last term and the number of terms of geometric series, and the decimal conversion of different decimals.

In the 19th year of Wanli (159 1), King Gong Zheng died of illness, and Zhu Zaiyu was indifferent to fame and fortune, so he wrote to the emperor and was willing to give up the throne.

After Emperor Wanli approved Zhu Zaiyu's abdication, Zhu Zaiyu claimed to be a Taoist priest who stayed out of touch with the world and moved to Huaiqing House.

From then on, Zhu Zaiyu stayed away from the world and concentrated on his studies. Reading in a room full of books every day, living a scholar-like life.

The calendar of the Ming dynasty is a big calendar, which often makes mistakes. Zhu Zaiyu presented "Shengshou Wanli" and "Reconciliation of Law Calendar" to Wanli, and asked him to change the calendar.

Emperor Wanli rejected Zhu Zaiyu's request. Later, in fifteen years, Zhu Zaiyu made seven memorials, and finally got the approval of Wanli.

16 10, Zhu Zaiyu wrote the earliest acoustic theory book "The Complete Book of Music" in the history of music.

16 1 1 On the sixth day of April, Zhu Zaiyu died at the age of 76. He was buried on Jiufeng Mountain and was awarded the title of "Duanqing".