Air China aquired six A340-313X through the merger with China Southwest Airlines in 2003. On average, they are about 10.5 years old, but all been refitted with new seats with new layout throught out in 2005-2006.

The seating plan for all airbus is not available from Air China, although you can find all boeing configurations here http://www.airchina.co.uk/en/managemytrip/seatmaps.html

That really shows us who they prefer to work with.