Lucasiu:

Get your facts right!

Air China is the national airline for China, it has less than 5 A340s in its fleet, for long haul flight, it uses B747-400, and B777-200. And to my knowledge those planes has been tranferred to XingJiang Airlines.
I am living in Sydney, Air China used to use B747-400 for the route, but few years ago they have changed it to B777.
It is very rear to see a Air China A340.
The only major airline in China extensively uses Airbus is China Eastern.