The most mind-bending thing about the whole affair is that three people told three completely different stories about the same event.
Theme: An older brother fakes evidence and lies, using genuine supporting materials?
A younger brother is greedy and selfish, unable to prove his innocence?
While they were still students, the two brothers couldn't make the right choices because of the Chinese-style family dynamic of "I'm doing this for your own good." By the time they were able to choose for themselves, they had already been consumed by human desire. Both of them could be called selfish, especially the older brother, who lost everything and then flew straight into the flames of revenge like a moth.