The Promise of Chang’an - watch online: streaming, buy or rent
Currently you are able to watch "The Promise of Chang’an" streaming on Rakuten Viki or for free with ads on Rakuten Viki. It is also possible to buy "The Promise of Chang’an" as download on Amazon Video.
Besides streaming, you can also buy the series on DVD from Amazon DVD / Blu-ray and watch it anytime.
There aren't any free streaming options for The Promise of Chang’an right now. If you want know when it is streaming for free, click 'Free' in the filters above and hit the notification bell.
