What does it mean that two swallows fly over wisteria?

Happiness. According to China Folk Network, the moral of two swallows flying over wisteria is to wish people a happy life. People regard swallows as auspicious birds, and there are Ziteng Swallow Map and Bald Fu Guitu as gifts and blessings for friends. The domestic swallow is a bird of the genus Swallow in Swallow Family. Swallows' heads, necks and tails are covered with metallic dark blue and black, their wings are also black, and their flight feathers are long and narrow; The chin, throat and upper chest are brown chestnut, and the feathers on the lower chest, abdomen and tail are light gray and white without markings; The tail is deeply forked, blue and black; The beak is dark brown, short and wide; Tatars and feet are black and delicate; Both men and women are similar. Domestic swallows are also called "swallows".