This is the second highest grossing film in Taiwan (after Titanic), and it's about the creation of a local music band, with flashbacks to an old love story told through letters.
I can see why it appealed to Taiwan, there are many elements they'd enjoy, which I'll try to list below.
The lead actress playing Tomoko is Japanese, and she has some scenes talking in Japanese, but mostly she talks in Mandarin with her heavy accent. Taiwanese just love Japanese people, and their accent (for girls) is endearing (even to me).
The lead actor playing Aga has that typical "bad boy" look, even though he's actually a good guy. He seemed to have a good chemistry with Tomoko, especially when…