Hair has always carried many psychological, philosophical, romantic, and cultural meanings in Chinese culture. In Han ethnicity, people call the union between two people “jie-fa” (Chinese: 結髮), literally means “tying hair”. During the wedding ceremony, some Chinese couples exchange a lock of hair as a pledge, while others break a hairpin into two parts, and then, each of the betrothed take one part with them for keeping. If this couple ever get separated in the future, when they reunite, they can piece the two halves together, and this completed hairpin will serve as a proof of their identities as well as a symbol of their reunion. In addition, a married heterosexual couple is sometimes referred to as “jie-fa fu-qi” (Chinese: 結髮夫妻), an idiom which implies the relationship between the pair is very intimate and happy, just like how their hair has been tied together.