In 2004, the 1st-phase coal bar processing capacity reached 150,000 tons; in 2007, the 2nd-phase wash oil deep processing capacity reached 50,000 tons; in 2008, the 3rd coal tar processing capacity reached 450,000 tons; in 2011, the 4th polycarboxylic acid project was put into production, and the designed annual output reached 50,000 tons; in 2012, the phthalic anhydride processing project was established and the designed annual output was 40,000 tons. At present, the company ranks the leading position in China, the second place in Asia and top ten in the world.