Longjing tea from bluish to deep green after steeping. Before infusion, higher quality Longjing teas have a very tight, flat shape and light green color. A study by Wang and Ruan (2009) found that one aspect of the perceived low quality of Longjing teas was a higher concentration of chlorophyll, producing a darker green color. The study revealed that free amino acids and theanine concentrations contribute positively to what is perceived as a good taste. Longjing tea was granted the status of Gong Cha, or imperial tea, in the Qing dynasty by the Kangxi Emperor. According to the legend, The Kangxi Emperor's
Longjing, Hangzhou Longjing, Hangzhou Longjing (), literally "dragon well", is a name applied to a number of locations and products from the southwestern region of the city of Hangzhou in Zhejiang province, China. Most notably, the name refers to the titular Dragon Well itself, located near Longjing village () in Xihu District, as well as the area encompassing the well and the Longjing tea famously grown there. The Dragon Well region consists of a number of villages, tea plantations, tea houses, parks, and a temple. The area is popular for drinking and buying tea as well as visiting the Eight Scenes of