Trailer:
https://www.youtube.com/watch?v=QKJlQyFJTPg
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I watched this movie on Xmas Eve. I thought it was an okay movie. But was surprised by its plotclick to show/hide spoilers.
After thinking about it some more, movie actually made sense and is rather funny:
The side that was enjoying all the singing and dancing --- it's the Mainland China.
The side that was under Japanese attack and has to defend that building --- it's Taiwan.
The Japanese force that threatened to launch artillery shells to flatten everything --- it's the PLA.
The soldiers were welcome to defect to the other side in the end (Mainland welcoming all Taiwanese to defect).
T'was stupid to fight and get killed by the Japs (t'will be stupid to fight and die by the PLA).
I'm not learned in Chinese history, but ain't the flag they raised and got killed over for nothing at the roof of the building the Taiwanese flag?
Overall, movie was a message to mock Taiwanese secessionist forces. Coz life was shown to be much better on the other side of the river!