Returning back to the present time for a while, let's see what actually happened on that day.
ChunHua who needed to board the plane in a short time, after being withheld by YuTang, all of a sudden, was late and was unable to board the plane on time. Her team of assistants had already boarded and so, she simply told them to change her flight to the next one scheduled after two hours.
Knowing that YuTang was busy preparing for the film, she didn't call him and simply decided to go through some future work. The wait wasn't long with her concentrating on her work, after two hours, she boarded the plane for a journey that would take a little over 8 hours because of all the detours.