The white grape variety originates from China. The name means Dragon's Eye; synonyms are Czhi-Pu-Tao, Dragon's Eye, Hun-Juan-Sin, Long Yan, Lon Ye, Long Yan, Lounian, Lungyen, Lun Yan, Lungyen, Oeil de Dragon and Ryugan. It has long been considered identical to the Japanese variety Ryugan. However, the morphological descriptions are different. The variety was a crossing partner in the new varieties Xiongyuebai and Zeyu. The late-maturing, high-yielding vine is resistant to frost. It yields green-yellow, full-bodied white wines with fruity aromas that are suitable for sparkling wine and brandy production. The variety is used as a winepress and table grape. It is widely grown in the eastern provinces of Hebei, Shandong and Shanxi. In 2016, 1,000 hectares of vineyards were designated (Kym Anderson).