good_badrabbit

Traditionally, children in China are considered 1 year old at birth and when Lunar New Year passes, everyone grows older by a year. So because she was born on the day before New Years, she’s already 2 years old by the time she’s been a day old. In ch 2 she says she’ll be 15 after the next new year, but because she was born the day before, in reality she’s closer to 14 and at the time they met she was 13.

It’s what Sun You thinks. He traced the mother back to the family and Jiang Yu and Jiang Ran were announced as twins. Since he knows the mother died in childbirth, he assumed she gave birth to twins