Desperately trying to find a song from a Chinese movie. I hope someone here can help!

The movie was about gangs, and near the end of the movie, a lot of people die in a warehouse. Sorry I can't remember more. It was years ago.

The song was (I'm pretty sure) called Wildflower (the Chinese word for wildflower). It had a female singer, and sparse acoustic guitar accomplishment. It was a solemn sounding song.

I'd love to hear it again, if I can find it.