The 'Lantern Festival' is also known as 'Yuanxiao Festival'. The term 'Yuan' refers to the first lunar month, and 'xiao' was an ancient term for night. Given that the full moon on the fifteenth day is the first of the year, the fifteenth of the first lunar month is hence known as the 'Yuanxiao Festival'. It is also known as Little New Year, Yuanxi, or Lantern Festival, being the first significant festival after Spring Festival.
The Lantern Festival in the Great Jin Nation was similar to the custom of Cai Wei's world, where on the bright moonlit night, lanterns were lit and lantern riddles played, lion dances and dragon dances performed, with the entire nation celebrating, creating an incredibly bustling atmosphere.
After Cai Wei and her group solved some lantern riddles, they walked through the lively and bustling streets, making their way to Cao Jin's restaurant while enjoying friendly banter.