A stereotype in West that chinese and asian women are docile, fragile and submissive to men. They are seen as typical girly girl and ideal wives. This stereotype is not always true beacuse chinese and some other asian women are known to dominate their boyfriends and husbands and in rare cases miserably treat them but when it comes to white men they are known to behave like china doll due to pinkerton syndrome in order to impress white men.
Cho chang is acts like a china doll and behaves like sarong party girl in front of white men.
when you're holding up your phone and making faces at it, as though you are taking a selfie, but you're really taking a picture of the person across from you or the wall or anything else that seems interesting but you don't want to be caught dead taking a picture of.
This action is often made more convincing by wiggling the eyebrows or opening the mouth, to pretend you're trying to get a Snapchat filter to work.