Soaking dates, also known as yin jujube and Jugan, was called "yin jujube" in ancient times, which often appeared in Taoist books and was a folk method passed down from generation to generation in Shaanxi. In addition, it is also described in Chen's novel White Deer Plain.

In Shaanxi folk, the dried and pitted red dates are put into the girl's privacy, absorbed, dried, rolled up and eaten, which is yin jujube.

White Deer Plain is a novel in the true sense. "White Deer Plain" has a small starting point, but it has a grand narrative and many characters, describing the torrent of the times, the struggle of small people and countless details. Picking dates is an impressive and indispensable detail description. Tian Xiaoe was born in a scholarly family, and his father was a scholar in the late Qing Dynasty. Judging from the character setting, Tian Xiaoe agrees with feudal patriarchal clan system and feudal ethics, and belongs to a more traditional woman. After Tian Xiaoe became Guo's concubine, she also hoped to lead an ordinary life. Helpless, the big room is bound by everything, especially as a tool for soaking dates. This made Xiao E feel humiliated and inspired her rebellious spirit.