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
Koreans in China joined the People's Volunteer Army in response to the Chinese Communist Party’s call. These bilingual soldiers provided valuable communications help to other Chinese soldiers with locals in Korea in addition to manpower. Zhao Nanqi, Li Yongtai are two of the most notable Korean figures who participated in the war. Koreans in Longjing also organized the “Yanji Jet” donation campaign. Donations from Koreans in Yanbian reached the equivalent value of 6.5 jet fighters. On 3 March 1952, Yanbian was officially designated as a Korean Autonomous Region and Zhu Dehai was appointed as the first Chairman. On 20 July 1954, the first