China Eastern Airbus A330-200 B-5920
Interestingly, MU731 is scheduled as a Boeing 767-300 service, as seen below:
Shanghai Airlines Boeing 767-300 (operating on behalf of China Eastern - file photo)
It is unknown as to why China Eastern sent an A330 instead of a 767 on the route.
The A330 should be departing back to Shanghai Pudong (ZSPD) as MU732 at about 10:00am.