Marvel starts filming several Iron Man 3 scenes in Beijing on Monday. And I’ve learned from my Chinese-based movie biz sources that the studio has just cast leading Chinese actor Wang Xuequi as a new character playing “Dr. Wu”. The highly secretive Marvel has been prepping for the shoot for a week in Mainland China. DMG Entertainment is Iron Man 3’s Chinese distributor, and is working to help staff the shoot on the ground. Marvel still intends to file for co-production status – but apparently they have a permit to film and are ready to go on that front.