The leaf is about 45 cm long. Lu'an tea Lu'an tea (), which is also called Lu'an Melon Seed tea, is used for Chinese medicine. It can only release its aroma when it's baked right. The inherent quality of this tea is considered quite good. This type of tea is especially suitable for people who are suffering from gastric problems. Lu'an tea is still produced in China, Anhui Province, China. The Lu'an tea from the Bat Cave of Jinzhai County is considered of superior quality, as thousand of bats in the cave can provide an ideal fertilizer for the tea plants. Songluo tea Songluo tea is manufactured at Songluo Mountain located north of Xiuning County in Anhui Province, China. The tea plantations are scattered at an elevation of six to seven hundred meters on the mountain. There is no real Songluo tea grown outside an area of a dozen mu (one mu = 667 square meters) and only few families possess the refined full to prepare Songluo tea. The tea hand-baked recently by mountain monks is even better. Genuine Songluo tea is produced at the foot of the Dongshan (Cave Hill) and on top of the Tiānchí (; lit. "Heaven Pool"), highly treasured by people in Xin'an County. It is also a favorite for the people of Nandu and Quzong counties, due to its ease in brewing and intense aroma. Longjing and Tianmu tea Longjing tea and Tianmu tea may match Heaven Pool tea due to the weather in their growing regions. Because the cold season comes earlier to the mountains, there is abundant snow in the winter, hence the tea plants germinate later. [Wen Zhenheng] Longjing tea is manufactured in the West Lake district of Hangzhou, China. The Longjing, literally "Dragon Well", is located at Fenghuang Mountain. Tianmu Mountain is located at Lin'an County in the north west of Zhejiang Province. There are two 1500-meter peaks, each with a pond on top filled with crystal clear water looking like an eye, hence the name Tiānmù (, lit. "heaven eye"). Tea as tribute During Ming, tea was a form of currency also used to pay imperials tribute. Ming Dynasty founder Zhu Yuanzhang (also known as the Hongwu emperor) was born to a poor family and understood the difficulties of the lives of farmers. He abolished the compressed tea brick style and replaced it with the whole, loose-leaf tea style, and