The Longest Day in Chang'an (2019) is a Mystery, Action & Adventure series that follows chang'an. The city of Eternal Peace. China's ancient imperial capital and the world's most magnificent metropolis. Its treasures and wealth are now under siege from a mysterious army. In 24 hours the enemies will launch a devastating attack. While the nobles panic and flee, the city's most notorious criminal will be its savior! Currently, you can watch The Longest Day in Chang'an on Rakuten Viki, Amazon Video. Streaming availability may vary by country and platform over time. It has a user rating of 8.4 out of 10 from 39 votes. Fans of mystery series may also want to explore similar titles below.