Both places are authentic, because Du Kang "traveled all over the green mountains to find good springs" in Luoyang. According to legend, the best springs for winemaking selected by Du Kang include Jiuquan, Black Tiger Spring, and White Tiger Spring. It is the best spring for brewing Dukang wine. Jiuquan is located in Caidian Township, Ruyang. It is surrounded by three mountains, with a stream of water flowing, the birds singing and the orioles singing, and the willows dark and the flowers bright. Tiger Spring is located in Yichuan. This spring faces Hu Mountain to the west, Feng Mountain to the east, Jiuquan Mountain to the south, and Longmen Mountain to the north. The spring water is clear, pure in quality and sweet in taste, warm in winter and cool in summer, gushing out all four seasons, and you can smell the aroma of natural wine from afar. So they are all authentic