What is a threshold connection?

The lintel couplets, also known as couplets, have a long history and are the crystallization of China traditional culture. It inherits the customs of the Chinese nation for thousands of years and embodies the cultural self-confidence deeply hidden in the hearts of Chinese people. It can be said that lintel couplets are a folk custom that cannot be replaced by any other form. The charm of lintel couplets lies in that it is not only a unique art form in the world that perfectly combines words and calligraphy, but also can appreciate elegance and vulgarity. From the imperial palace to the people's homes, from Confucius Temple to Guan Gong Temple, from Yueyang Tower to Wang Tengting, threshold couplets can be seen everywhere. As an important part of folk culture, Spring Festival couplets are even more indispensable in people's lives. Every family should write ten and eight blessing Spring Festival couplets on the first day of New Year's Day. Some of them are posted not only at home, but also on chicken coops and pigsty. Even in the carriage, you can see a pair of bright red Spring Festival couplets: the car is thousands of miles away and people are dying. Threshold couplets were later divided into door couplets and Spring Festival couplets. Generally, there is no punctuation in the threshold couplets and door couplets, and sometimes punctuation is added in the church couplets for easy understanding.