Longkou City has a long history. Laiguo was founded in the late Shang Dynasty and is known as Donglai Ancient Country. Qixian County and Huangxian County were established in Qin Dynasty, which was one of the earliest county administrative units in China. Longkou City is not only the hometown of Xu Fu, a famous alchemist in Qin Dynasty, but also the sailing place where Xu Fu led his fleet across Japan more than 2,200 years ago. 1986, with the approval of the State Council, Huangxian County was revoked and Longkou City was established. The vicissitudes of 5,000 years have left many historical sites and human civilization for this rich and outstanding land, adding to her mystery and charm. Chunyu Kun, who was famous for his wit and eloquence during the Spring and Autumn Period and the Warring States Period, satirized the establishment of hegemony between Cambodia and Qi Weiwang; Xu Fu, a famous alchemist, led thousands of boys and girls and various grain workers to the east in the Qin Dynasty, creating friendship between China, Japan and South Korea. Taishi Ci, a famous Wu Dong warrior in the Three Kingdoms period; Hu Dahai, the founding father of the Ming Dynasty, was an upright official, Wang Shizhong, a senior minister, Fan Fu hammer, the cabinet record, and Jiang Yin, a famous painter in China. Jia Zhen, who was in charge of Wenheng for many years in Qing Dynasty; Wang Shouxun, academician of Hanlin who participated in the compilation of national history; In the early years of the Republic of China, a number of historical celebrities such as calligraphers, seal engravers and ancient writers Ding Foyan stood out. Since the reform and opening up, Longkou's economy and social undertakings have developed rapidly, and its economic strength has been increasing. 199 1 year ranked among the top 100 rural counties in China, 1994 ranked 35th among the top 100 rural counties in China and 2nd in Shandong Province. In ancient times, there was a story that Yang Zhen turned to gold at dusk.