Now it's 2009, and her dad, born in '76, is just 34 years old, while Yu Duoduo is now 16 and in ninth grade. Of course, it's summer vacation now and she'll be a high school student when school starts again. For the time being, they haven't been too particular about her age, still considering her as a 16-year-old ninth grader.
But 34 minus 16 equals 18, right? That's how old Yu Duoduo's dad would have been when he had her. Since it takes nine months to have a baby, if you track back the time, it means that Yu Duoduo's dad would have had her when he was just 17.
If that's really the case, then either her father was involved in underage love, or Yu Duoduo is lying.
But everyone knew in their hearts that it was definitely Yu Duoduo who was lying.