What is the meaning of the door plaques on ancient Chinese dwellings? | Eng Sub

In this episode, we continue to visit the Gulian ancient villages of the Ming and Qing Dynasties in Qi County, Shanxi.
On the lintel of the ancient dwellings in the village, one piece after another of quaint plaques, makes people feel as if they have opened up layers of historical books, and feel Gulian Village full of history and culture.
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This film provides 3 external subtitles, click the "CC" button to turn on, or set:
1. Simplified Chinese
2. Traditional Chinese
3. English