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
Chinese Students and Scholars Association many others. It also caused controversy and even became a subject in vice president Mike Pence's Oct 2018 policy speech on China. The associations are sponsored by Chinese embassy and consular officials, and the Chinese government has a consistent policy toward Chinese students and scholars since 1990. The documents and emails obtained by "Foreign Policy" in 2018 showed that the Georgetown University CSSA accepted funding from the Chinese Embassy in Washington, D.C. , which amounted to roughly half its total annual budget. A former CSSA-Pittsburgh chairman said on Sina-Weibo that their chapter received a US$6000 yearly budget from the Chinese