"Song dynasty diancha really values the purity, or whiteness, of the tea foam," Zhu says. The foam is also much thicker than that of matcha, which only requires brief whisking. Drawing on the foam ...

The imperial tombs of the Northern Song Dynasty (960-1127), the Song Mausoleums, are in western Gongxian County, Henan Province. Except for Emperor Hui Zong, named Zhao Ji (1082-1135), and Qin ...