SPOILER ALERT!!! Many viewers believe that Jingjing was actually hanging on to the window before she fell because there is a scrap of fabric from her dress stuck outside the window. In episode 3 you can also hear Pu Pu say "She fell down", whereas in the final episode when Chaoyang remembers it she says "She is going to fall." This means it's possible that either Chaoyang then pushed her off while she was hanging there or didn't help her when she was hanging there when he could have. Some viewers think that Chaoyang pushed her because of what Pu Pu says in her letter to Chaoyang. In it she says that she never told Yan Liang the truth about what happened with Jingjing but she hopes that one day Chaoyang will be able to confess the truth and start over.