Here is another Chinese animated film I loved after watching it online, Havoc in Heaven. Made in 1965 and based on the classic mythological novel Journey to the West, the film covers the mischievous Monkey King's early misadventures from the novel, like rebelling against the Jade Emperor of Heaven.
Journey to the West is another classic story that intrigues me and also got me into literature from other countries. I remember seeing an animated English-dubbed TV series of Journey to the West that was made in 1999. In 2002, the series' episodes were edited and made into a OAV (original animated video) movie called "The Legends of the Monkey King." So after watching Havoc in Heaven, I've concluded that I love it better than any film adaptation of Journey to the West.
Overall, I really love this film, and I love the character designs in the film, especially for the monkeys. They're so cute!