1. Auspicious symbol: The dragon symbolizes auspiciousness and strength in China culture. Dragon patterns on couplets can add auspicious and solemn atmosphere, which is in line with traditional cultural values.
2. Increase the aesthetics: The dragon pattern on the couplets can increase the aesthetics of the couplets, giving people a solemn and unique feeling. This design choice can attract people's attention and combine with traditional culture to show unique charm.