Bisa ga rubuce-rubucen tarihi, tsaunin Mengding shi ne wuri na farko a tarihin kasar Sin inda aka rubuta bayanan tarihi.shayi na wucin gadishuka.Daga bayanan farko na shayi a duniya, "Tong Yue" na Wang Bao da kuma tatsuniyar Wu Lizhen ta dasa itatuwan shayi a Mengshan, ana iya tabbatar da cewa tsaunin Mengding na Sichuan shi ne tushen noman shayi da samar da shayi.Koren shayi ya samo asali ne daga Badi (yanzu arewacin Sichuan da kudancin Shaanxi).Bisa ga bayanan "Huayang Guozhi-Bazhi", lokacin da Zhou Wuwang ya ci Zhou, mutanen Ba sun ba da shayi ga sojojin Zhou Wuwang."Huayang Guozhi" wasiƙar tarihi ce, kuma za a iya sanin cewa ba da dadewa ba a daular Zhou ta Yamma, al'ummar Ba da ke arewacin Sichuan (shayin bautar Buddha Bakwai) suka fara noman shayi ta hanyar wucin gadi a cikin lambu.

Koren shayi na daya daga cikin manyan shayi a kasar Sin.

Ana yin koren shayi daga sabon ganye ko buds na bishiyar shayi, ba tare dafermentation, ta hanyar matakai kamar gyarawa, tsarawa, da bushewa.Yana riƙe da abubuwan halitta na sabbin ganye kuma ya ƙunshi polyphenols shayi, catechins, chlorophyll, caffeine, amino acid, Vitamins da sauran abubuwan gina jiki.Koren launi da miya na shayi suna kiyaye koren salon sabbin ganyen shayi, saboda haka sunan.

Shan koren shayi a kai a kai na iya hana ciwon daji, rage kiba da rage kiba, da rage illar nicotine ga masu shan taba.

China ke samarwakore shayia wurare da dama da suka hada da Henan, Guizhou, Jiangxi, Anhui, Zhejiang, Jiangsu, Sichuan, Shaanxi, Hunan, Hubei, Guangxi, da Fujian.