In the first year of Zhenguan in Tang Dynasty (AD 627), Yuan County was abolished and merged into Boping County. Since then, Yuan County has never been seen again. In the fourth year of Chang 'an in Tang Dynasty (AD 704), the ancient city of Yuan County in Northern Wei Dynasty (now South Wen Zi Village) was restored to Laiwu County. Since then, Laiwu County Office has been located in Laiwu City. In the fifteenth year of Yuanhe, Laiwu County was merged into Ganfeng County, and Laiwu County was restored in the first year of Taihe. Governance is still in Nanwen Village, belonging to Lu County, Yanzhou. In the early Song Dynasty, it belonged to Lu County of Yanzhou, and later to Lu County of Qingfu. In the Jin Dynasty, Laiwu supervisor, who was in charge of smelting in Laicheng today, was abolished, and Laiwu County, located in Nanwen Village, moved to the former site of Laiwu supervisor in the 12th year of Dading, belonging to Tai 'an Prefecture. The Yuan Dynasty and the Ming Dynasty remained unchanged. The Qing Dynasty belonged to Tai 'an Prefecture. 19 15 belongs to Jinan Road. 1925 belongs to Taian Road. 1928 is directly under Shandong province.
The origin of Laiwu's name is said. Let's take a test: the theory of falling rocks. In ancient times, it was said that a stone fell from the air near Laiwu city, and its source was unknown. According to the Taoist view, this stone comes from "nothing", so the county was named Laiwu.
Lai Min said he expanded the valley. In 567 BC (in the sixth year of Wu Jia and the fifteenth year of Qi), Qi Huangong destroyed Lai (note: Qi Huangong destroyed Lai and moved to Tan). "Notes on Shuijing" quoted an old saying: "The Qi Palace bell destroyed Lai, and Lai people laid this valley, and the city was deserted, so it was called Laiwu." Named after a mountain. Notes on Water Classics Zi Shui: "Taiwu and Lai Zuo are also called mountains, and the counties and counties take their eyes, and the Emperor Gaozu made them."
Lai and Mou Yin said specifically. In the book Man and Alien, Wang believes that Laiwu is named after the mixed residence of Lai and Mou. In ancient times, there was the word "Mou", which was pronounced with a strong lip sound and its sound was similar to that of "Wu", so it was transliterated as Laiwu, hence its name.