Crouching Tiger, Hidden Dragon is a 2000 wuxia martial arts action adventure film directed by Ang Lee and written for the screen by Wang Hui-ling, James Schamus, and Tsai Kuo-jung.
The film stars Chow Yun-fat, Michelle Yeoh, Zhang Ziyi, and Chang Chen. It is based on the Chinese novel of the same name, serialized between 1941 and 1942 by Wang Dulu, the fourth part of his Crane Iron pentalogy.
https://en.wikipedia.org/wiki/Crouching_Tiger%2C_Hidden_Dragon
I actually hit the next level in Mandarin by watching this movie once a day for a month.
Their diction and rhythm is uncommonly clear in this movie and the patterns sunk in after a few viewings so that I could finally understand Mandarin instead of just speaking it.
It was as effective as being in a language class but then every few minutes the teacher would break out in acrobatic sword fights and recapture your attention.