Longjing tea or called Lung Ching and Dragon Well is a famous variety of green tea from Hangzhou, Zhejiang Province, China where it is produced mostly by hand and has been renowned for its high quality, earning the China Famous Tea title. Longjing is divided into seven grades: Superior (qiqiang), Special (queshe), and then 1 down to 5.

Longjing tea leaves are pan fried (unlike most other teas, which are steamed) to stop the fermentation process. In the world of tea, the term "fermentation" refers to the drying of the freshly picked leaves, resulting in enzymatic oxidation. This oxidation is stopped by frying or steaming the leaves before they completely dry out. As is the case with other green teas, Longjing tea leaves are unfermented. When steeped, the tea produces a yellow-green color, a gentle, pure aroma, and a rich flavor. The tea contains Vitamin C, amino acids, and the highest concentration of catechins among teas.

The name of this tea literally means "dragon well", a well that contains relatively dense water, and after rain the lighter rainwater floating on its surface sometimes exhibits a sinuous and twisting boundary with the well water, which is supposed to resemble the movement of a traditional Chinese dragon.

Longjing tea was a favourite of Chinese emperors, the most notable being Qianlong. It was widely known that to achieve the best taste from Longjing, spring water from the "Hu Pao Quan" was to be used. Water is boiled then cooled to about 80 degrees celsius before being used to brew the tea leaves.