What does it mean for a man to send a message to a woman to eat glutinous rice balls on the solstice of winter?

On the winter solstice, men take the initiative to send messages to women to eat dumplings, which means that men invite women to their homes to celebrate the traditional winter solstice festival in China. The winter solstice is an important solar term among the 24 solar terms, and it is a traditional folk ancestor worship festival in China. The custom of winter solstice varies from region to region. In southern China, there is a custom of offering sacrifices to ancestors and eating glutinous rice balls on the solstice in winter. In the north of China, they eat jiaozi.