Urebye ku mateka yanditse, Umusozi wa Mengding niho hantu hambere mu mateka y'Ubushinwa ahari inyandiko zanditseicyayi gihimbanogutera.Duhereye ku mateka ya mbere y’icyayi ku isi, “Tong Yue” ya Wang Bao hamwe n’umugani wa Wu Lizhen wo gutera ibiti by’icyayi i Mengshan, birashobora kwemezwa ko Umusozi wa Mengding muri Sichuan ari wo nkomoko yo gutera icyayi no gukora icyayi.Icyayi kibisi cyatangiriye i Badi (ubu ni amajyaruguru ya Sichuan no mu majyepfo ya Shaanxi).Dukurikije inyandiko za “Huayang Guozhi-Bazhi”, igihe Zhou Wuwang yatsindaga Zhou, abaturage ba Ba batanze icyayi ingabo za Zhou Wuwang.“Huayang Guozhi” ni ibaruwa y'amateka, kandi dushobora kwemeza ko bitarenze ku ngoma ya Zhou yo mu Burengerazuba, abaturage ba Ba mu majyaruguru ya Sichuan (icyayi cya Budha karindwi) batangiye guhinga icyayi mu busitani.

Icyayi kibisi ni kimwe mu byayi byingenzi mu Bushinwa.

Icyayi kibisi gikozwe mumababi mashya cyangwa amababi yigiti cyicyayi, ntafermentation, binyuze mubikorwa nko gukosora, gushiraho, no gukama.Igumana ibintu bisanzwe byamababi mashya kandi irimo icyayi cya polifenol, catechine, chlorophyll, cafeyine, aside amine, Vitamine nizindi ntungamubiri.Icyatsi kibisi hamwe nisupu yicyayi bibika icyatsi kibabi cyicyayi gishya, niyo mpamvu izina.

Kunywa icyayi kibisi buri gihe birashobora kwirinda kanseri, kugabanya amavuta no kugabanya ibiro, kandi bikagabanya kwangiza nikotine kubanywa itabi.

Ubushinwa butanga umusaruroicyayi kibisiahantu henshi, harimo Henan, Guizhou, Jiangxi, Anhui, Zhejiang, Jiangsu, Sichuan, Shaanxi, Hunan, Hubei, Guangxi, na Fujian.