China Eastern is a member of the SkyTeam alliance. You can redeem Eastern Miles for award flights on any SkyTeam airline:
Other China Eastern partner airlines include Qantas.
If you have an option to transfer your credit card points to a different SkyTeam frequent flyer program, we would probably recommend this. The English-language version of the Eastern Miles website doesn’t work properly, and dealing with this program could be a painful experience if you live outside of mainland China.