Our ancestors used shorthand books from Shang Dynasty to Eastern Han Dynasty, about 1600- 1700 years ago. Sima Qian, a great historian, wrote 130 copies of Historical Records, about 520,000 words, written in simplified Chinese characters. It describes the history of about 3000 years from the Yellow Emperor to the Emperor Wu of the Han Dynasty in ancient legends.

Many works in ancient China were written in simplified Chinese characters, such as The Book of Poetry, the earliest collection of poems by China, and Nine Chapters of Arithmetic, the earliest mathematical monograph in ancient China.

1972,4,924 bamboo slips were unearthed from an ancient tomb of the Western Han Dynasty in Zhangzishan, Linyi, Shandong. Most of the records in Jane are military knowledge. There are two earliest military books in ancient China: The Art of War by Sun Tzu and The Art of War by Sun Amin. Among them, Sun Amin's The Art of War has long been lost. This time, the original work was finally found.