Niu Langxing explained.

Altair, also known as Altair and Tianjin Star, is a constellation in the ancient legend of China. On the traditional Valentine's Day in China, this star is regarded as the place where cowherd and weaver girl meet, and it is one of the symbols of love and marriage happiness.

Altair is a constellation near Sirius, which is usually described as an arc or triangle composed of several stars. In China folklore, this constellation represents the place where the Cowherd and the Weaver Girl meet, and their love stories are all related to the name of this constellation. Legend has it that the cowherd is a hardworking and kind farmer and the weaver girl is a beautiful fairy. They met, fell in love and got married on this star. However, because Zhinu's grandmother was dissatisfied with their marriage, she took Zhinu back to the Heavenly Palace. In order to meet the Weaver Girl, the Cowherd rode across the Milky Way on the back of the cow and finally reunited with the Weaver Girl. Every year on Tanabata, people gather outdoors to watch this star and pray that they can meet and fall in love like cowherd and weaver girl, and have a happy love and marriage.

In short, the distant Altair has a very important symbolic significance in the traditional culture of China, representing a happy love and a happy marriage.