Complex sentence: As of 2010 production capacity is estimated at 700,000 units/year, and while that year's sales reached 519,800 making the company the sixth largest Chinese car-maker by units sold in 2011 it failed to break into the top ten.
Split into simpler sentences: As of 2010 production capacity is estimated at 700,000 units/year. While that year's sales reached 519,800 making the company the sixth largest Chinese car-maker by units sold in 2010, in 2011 it failed to break into the top ten.