Nice contrast between the parents and the kids attitudes.
Tong Tong's mother is incredibly supportive of her daughter on everything and is always trying to help her in her unique way> Tong Tong inmediatly tells her about her self-discovery of liking girls and decides to actually pursue a relationship with her love interest.
Lin Xiao Lu's mother is (aparently) the worst kind of helicopter parent, always judging and controling of her daughter's actions> Lin Xiao Lu is terrified of anyone discovering she likes girls and her first reaction to realizing she might be attracted to someone was to try and distance herself from that person.
Really showing good and bad parenting can afect the lives of those under it.