◇ In June 2005, the company used the original L3.3 compressor for transformation, recovering carbon dioxide from decarbonization air, producing industrial-grade carbon dioxide as a byproduct, which has reduced green house gas emissions.

◇ In March 2004, a 50,000-ton full high-pressure nitric acid production line was completed and put into operation.

◇ In November 2003, the company built a blowing air and nitrogen recovery unit to recover the latent heat of gasification air, achieving self-production and self-use of steam.

◇ In November 2001, the company built a set of ammonia washing and permeable mernbrane hydrogen recovery units,  completed the transfomation of recovering ammonia and hydrogen from synthetic air. 

◇ In September 1992, the company completed the construction of a 20,000-ton nitric adid production line and successfully put into operation.