The C919 is China's answer to the Airbus A320 and Boeing 737 -- a single-aisle, 168-seat, narrow-body commercial liner produced by Chinese state-run aircraft manufacturer Comac (Commercial Aircraft Corporation of China).

CNN: China's new super cargo jet takes to the skies

What matters most is not the closely drawn intellectual argument about rival policy platforms, but the body language and the pithy one-liner that sums up an opponent's faults.

BBC: Do the US presidential debates matter?