In 1950s, the national geological department conducted a general survey of diamond mines in Shandong Province. Finally, the focus of the search for diamond mines was on Linyi, and a special organization, the 809 Geological Team, was established. \ x0d \1965,809 team finally made a new discovery in Mengyin, northwest of Linyi. \ x0d \1August 24th, 965 is a date that should be recorded in the geological history of China. It is in this ditch, which looks different from any ditch where kimberlite was found abroad, that the first kimberlite vein in China was discovered, ending the history that there was no primary diamond mine in China. \x0d\ 1966, the construction of the first primary diamond mine in China began in changmazhuang, where the 809 team discovered kimberlite, which was officially put into production in 1970, that is, the building materials mine 70 1. \x0d\ Building Materials 70 1 Mine (formerly Mengyin Diamond Mine) is located in Changma Township, Mengyin County, Shandong Province. It is the first large primary diamond mine in China. It was founded in August 1966. It turned out to be led by the Ministry of Building Materials Industry. 1972 handed over to Linyi, Shandong. 1February, 1993, it belongs to China Nonmetallic Mining Corporation and is a directly affiliated enterprise. \x0d\ Kimberlite pit of building material "70 1" mine covers an area of 1 10 mu and is1/0 m deep. It is the largest primary diamond mine in China and even in Asia. \x0d\ Mine construction is divided into Phase I and Phase II projects, all of which are invested by the state, with a total investment of 37.96 million yuan, covering an area of 1.764 mu and a total construction area of 1.88 million square meters. There are 588 employees. Shengli 1 pillar is currently being mined. The total ore quantity of this pillar is 429 1.350 tons, the industrial diamond reserve is 4572380 carats, and the average grade is 672.3 1cl/m3. The mining area is located in Chengguan Town of Mengyin County, Changma Township and Wutai Township of Pingyi County, with a length of more than 30 kilometers from east to west. Over the past 40 years, the mine has produced nearly 1 10,000 carats of diamond products for the country, and created and accumulated rich diamond mining and transportation technology and experience. \x0d\ Diamond resources are rich in reserves and high in grade, and gem-grade large-particle diamonds are increasing year by year. 1983, Mengshan No.1 diamond weighs 1 19.0 1 carat; 19 1, Mengshan No.2 diamond weighs 65.57 carats; The Mengshan No.3 diamond weighs 67.03 carats, which has attracted the attention of diamond experts and merchants at home and abroad. \ x0d \ 2005 August 2005, Linyi Municipal People's Government declared and the Ministry of Land and Resources approved the establishment of Yimeng Diamond National Mine Park in Shandong Province, which is the only diamond mine park in China, the first national mine park in the province, and Kimberly Park in Yimeng Mountain National Geopark in China. The park is located at the northern foot of the scenic Mengshan Mountain, at the foot of Dawang Mountain, and in the urban-rural junction of Mengyin County. Relying on the construction of building materials "70 1" mine in a civilized country with a history of 42 years. \x0d\ According to the overall planning, the park construction is divided into seven areas: comprehensive service area, diamond Expo area, mine exploration area, diamond town rest area, diamond amusement area, gem processing area and mine sightseeing area. Parking lots and amusement centers will be built in the comprehensive service area; Diamond Expo area mainly builds a diamond museum; The proposed diamond tower, mining sculpture and mine leisure bar in the mine exploration area; Diamond Town Leisure Zone plans to build a diamond culture street, a diamond wedding street and a diamond house. The diamond recreation area is planned to build big waves, diamond drifting, diamond mining amusement, diamond legend amusement and diamond industry historical amusement; Diamond financial street, diamond factory and club will be built in the gem processing zone; The mine tour area shows the whole process of selecting diamonds.