Leiling jinshi jujube began in the Shang and Zhou Dynasties, the rise of the Wei and Jin Dynasties, flourished in the Ming and Qing Dynasties, more than 3,000 years of cultivation history, the natural geographic environment and the advantages of excellent varieties, resulting in its thin skin, small nucleus, thick meat, taste pure and sweet. It is the sixth agricultural product in our province to obtain the "protection of the region of origin", and it is also the largest traditional famous specialty product with the longest history in our province. Leling started to build selenium-enriched jujube production bases under the guidance of Shandong Province Spark Science and Technology Service Base Construction Office from 2004, and in 2004, the selenium content of jujube (fresh) was 0.043mg/kg; and in 2006, the selenium content of selenium-enriched jujube (fresh) bases in the city's Zhuzhi random sampling test reached 0.044mg/kg, which was 8 times more than that of ordinary jujube in the local area, and it also met the requirements of pollution-free quality. Pollution-free quality requirements. Lunar August fresh jujube can be marketed for sale, after the National Day dry jujube market.