I love to watch this series all the time.
This is the only series that i really love and watching it 5 times already.
Lou Zhi love Sheng Huainan from their childhood years.
I think they play well and meet frequently in childhood and Lou Zhi feel love at first sight.
Lou Zhi is really shy type but stand firm with her attitudes,characters,patience,affections,friendly and very smart.
Sheng Huainan choose wisely because of failed relationship.
Maybe he is tired because of too much trouble with her ex gf..that's why he test too much Lou Zhi.
He forgot her from childhood playmate but Lou Zhi continue to think of him.
Lou Zhi mother understand well her daughter even if there's conflict both parents.
Lou Zhi feel different in college..she has another perception towards life in college years.
Her love toward Sheng Huainan is really ultimate love and she wait until the end of her great first love.
When Sheng Huainan receive her letter,i think the story will be different if Lou Zhi confess him during high school years.

Ex girlfriend from Sheng Huainan is Lou Zhi seatmate..
She only pretending like Lou Zhi.

Zhang Migrui like Lou Zhi also..Maybe he sense that Sheng Huainan attract her also..
Zhang Migrui is a good guy,honest,friendly and feel so comfortable with Lou Zhi.
He feel really love to Lou Zhi..he is the one bringing her foods when Lou Zhi got sick.

Jiang Baili is really a good friend to Lou Zhi..they really playwell as best friends.

Lou Yang has also small feelings toward Ding but it's too late because he has already girlfriend.

I think many values from the story..
How to be good friends with other male/female.
Patience,Sharing ideas and thoughts,helping one another,
Never give up for love.
Love can wait if the love is really true toward other person.