Ma-Kalambay bounded off his line but failed to make contact with the ball as Smith arrived on cue to plant a firm header into the net from 12 yards and hand Orient a shock lead.
The restructuring of Caterham's line-up means Ma Qing Huang -- who made history when he became the first Chinese racer to drive in front of his home crowd during practice at the last race in Shanghai -- loses his role as the team's reserve as well as his place in Caterham's GP2 team.