Luban's problem

The legend of a skilled craftsman. Lu Ban was a craftsman of Lu State in the late Spring and Autumn Period, whose name was Gong Bo. The Spring and Autumn Period and the Warring States Period were a period of great social change in China, which was a transition from slavery to feudalism. Artisans have gained a certain degree of freedom, and the emergence of new productive forces and the transformation of production tools have created conditions for the improvement of technology.

Gongbo made outstanding contributions to process manufacturing during this period. Because of his superb skills and Lu nationality, people later called him "Lu Ban". The earliest record of Lu Ban's deeds is Mozi, which is also recorded in the Book of Rites, Tan Gong, Customs, Zhu, Yi Shu Ji, Youyang Miscellaneous Notes, and some notes and local chronicles. During the Warring States period, what was originally the loss of historical figures gradually became a folk legend.

The legend of Luban can be roughly divided into two categories:

One is to tell the story of his invention. It is recorded in ancient books that Lu Ban created ladders, warships, grinders, grinders, drillers and planers. He created doors and paved heads. In modern times, there is another legend that Lu Ban invented the saw and his wife invented the umbrella.

Another legend of Lu Ban is the story about his building famous bridges, temples, temples and other buildings all over the country. This legend has been circulating for a long time, and there are also legends in modern folks: the cracks in Baita Temple in Beijing were given by Lu Ban; The Jimingyi Stone Bridge near Bao 'an, Hebei Province was not built, because when Lu Ban was building the bridge, his sister (or younger sister) was afraid that he was too tired and learned the crow in advance, so Lu Ban stopped working. Shanxi Yongle Palace was built by Luban; The stone statue in the north of Dazu Mountain in Sichuan was carved by Lu Ban. The three stone pagodas of "Three Ponds Reflecting the Moon" on the West Lake in Hangzhou are the three legs of a stone incense burner that Lu Ban cut out to suppress snakehead essence. Among them, the legend of Lubanxiu Zhao Zhouqiao is the most famous, and it is included in "Notes on Lakes and Seas" (the second volume) compiled in the early Yuan Dynasty.

The Anji Bridge in Zhao Zhouqiao was originally designed and built by Li Chun, a craftsman of Sui Dynasty. The so-called Lubanxiu Zhao Zhouqiao is purely a folk legend, not a historical fact. The above-mentioned buildings of Lu Ban in various places, as well as some inventions listed in his name (such as sawing wood), are also legends created by people in different historical periods, not the results of the Spring and Autumn Period.