Double-seven Festival, also known as Qiqiao Festival, Qijie Festival, daughter's day, Qiqiao Festival, Qiniang society, Tanabata Festival, cow and bull woman's day, Qixi, etc., is a traditional festival among Chinese people. Derived from the worship of stars, Tanabata Festival is the birthday of seven sisters in the traditional sense. It is named "Tanabata" because the worship of "Seven Sisters" is held on July 7th. It is a traditional custom to worship the seventh sister, pray for blessings, make wishes, beg for skillful skills, sit and watch the morning glory Vega, pray for marriage, and store water on Tanabata. Through historical development, Tanabata has been endowed with the beautiful love legend of "Cowherd and Weaver Girl", making it a festival symbolizing love. Therefore, it is considered to be the most romantic traditional festival in China, and has produced the cultural meaning of "Chinese Valentine's Day" in contemporary times.