Of course this title is misleading. There are tons of Chinese girls that are as much players as the guys and break hearts without a second thought. However, at least in my experience, most Chinese girls are very affectionate and are eager, sometimes too eager, to give their love to any man that is sweet and kind to them, especially when they are young.
For the majority of Chinese girls, there is no such thing as a casual relationship. A Chinese girl usually interprets any intimate behavior, such as gifts, romantic messages, sex, etc., as indications of long-term relationship potential, and the fact of the matter is that most Chinese girls are looking for a man to take care of them and they are quick to latch on to such possibilities. I don't mean this in a condescending or diminutive way; I'm just stating my observations after years of field research :-). Chinese girls are extremely affectionate and usually very loyal, because their man is providing them with stability and security. In return she gives her affection, her body, and her fidelity. Whether this is "love" is another discussion, but it is this "emotional transaction" that leads to so many broken hearts among Chinese girls.
Everyone has fanciful illusions of fairy tale love stories but of course reality is a harsh teacher. A man can throw out words and money and attention willy-nilly but a girl's affection is her precious possession, and when it is tossed aside after being used up, it can be devastating. Chinese girls are very naive about love and romance, in spite of it being largely absent from Chinese culture. Yet a heart is a heart, and love is an incredible treasure, and when it is placed in the hands of someone who recognizes just how special it is, that heart will sing. But the sad truth is, far too many hearts grow cold and dim as the beautiful dream withers and dies, leaving a life that is biologically satisfied but lacking any real purpose.