In 2011，the market size of PLC was 7.822 billion, with a year-on-year growth of 14.5%, the growth rate was decreased by 12.2%.

The market performed a high-low trend. Due to the inertial growth in 2010 and the earthquake in Japan leaded to the hoard goods phenomena, sales growth rapidly in the first half. Because of the credit crunch and the decrease in the OEM industry export, sales fell significantly in the second half.

   Medium-sized PLC market was the fastest growing, with an increase of nearly 20%. Followed by was the small PLC market, on a year-on-year growth of 16%. Large PLC market growth rate was moderate with only 4%. There was an outstanding performance of domestic enterprises with 30%-80% of the high-speed
growth.

    In addition, the most compelling is that mainstream manufacturers had made a large-scale organizational restructuring to adapt to the market. These adjustments were to some extent affect their performance in 2011, but these are bound to have a profound impact on the future of the PLC market.