Conducted about 2800 environmental impact assessments by 2002. Conducted about 300 pollution control Engineering plan assessments by 2002. Conducted environmental inspection of construction of the large-scale .   municipal engineering such as Hongshulin section of Binhai Expressway, Xiaping Waste Graveyard, Nanshan Refuse Power Plant etc. Completed about 230 engineering projects of wastewater, gas, and noise   control. Invented J-sound-eliminator that received the Provincial Award for Technological   Achievement, the very prestigious award in Chinese research programs. Developed the ventilating and sound-eliminating window that is patented in China   (Patent No ZL 98 2 49482. 3) Built the noise barrier on Binhai Expressway that received the Award of Best   Quality Engineering in Shenzhen. The Noise Control Engineering in Zhuzhou Smeltery received the Top-grade Award   of Best Quality Engineering in the Metallurgical Ministry and Guangdong province.