This is a two-part allegorical saying. Lanterns hung on holidays are basically auspicious patterns and auspicious blessing words. In addition, the red of lanterns is the color of cinnabar, which is a very effective treasure in geomantic omen. Therefore, there has been a tradition of hanging red lanterns at the gate on holidays since ancient times.
Lantern is not only a tool for ancient lighting, but also a symbol of good fortune in traditional geomantic numerology. Because the pronunciation of "Deng" and "Ding" is similar, it indicates that people are prosperous and is regarded as a good omen for good luck.
The origin of two-part allegorical sayings:
The name "Xiehouyu" first appeared in the Tang Dynasty. The so-called "Wu Hou of Zheng" (a kind of "Hou Hou" poem) has been mentioned in the biography of the old Tang Dynasty. However, as a language form and phenomenon, it appeared as early as the pre-Qin period.
For example, "The Warring States Policy Chu Ce IV": "It's not too late to mend." In other words, it is not too late to repair the sheepfold after the sheep is lost. This is the two-part allegorical saying we saw today.