The bun is an ornament used by ancient Han people to fix and decorate their hair. For modern people, this is an ancient term, but when watching costume dramas, we can always be moved by the exquisite effect of decoration. Ancient hair products took various forms, including bone, stone, pottery, clam, Jing, bamboo, wood, jade, copper, gold, ivory, ox horn, tortoise shell and so on.

Among the headdresses of ancient Han women, there is also an ornament called "hairpin". Both the bun and the hairpin are used to insert hair, but the structure is different: the bun is generally made into one strand and the hairpin is made into two strands; In addition, there are some differences in use. Hairpins became popular in the late Western Han Dynasty. Since then, it has been one of the main headdresses for women in China. Today, hairpins still occupy a place in women's jewelry, such as hairpins evolved from hairpins.