What is the name of the hair on the back of the ancient old woman's head?

Elastic surface, also called twisted surface, open surface, etc. , a long-standing cosmetic method, uses thread to remove hair from women's faces in West Asia, Central Asia and East Asia. In China, from north to south, such as Hebei, Jiangxi, and Guangxi, there is a custom for women to open their faces. Moreover, it is usually performed by female elders before women get married, which is a rite of passage. A woman opens her face once in her life, and then she doesn't open it after divorce and remarriage. In some places, before the opening ceremony, the host family cooks "Opening jiaozi" and gives it to relatives and friends to show good luck, while others sing opening songs to wish the bride a child. In the specific operation, the performer uses a thin hemp thread, which is pulled with one hand in the middle and tied at both ends on the thumb and forefinger of the other hand. Or bite in the middle with your mouth, and two gloves hold both ends to form a crossed triangle. Hemp twines around a woman's face, trying to get her hair out. In addition, eyebrows and sideburns should also be trimmed.