The laboratory of hubei yilai company and the central and southern detection center of yilai began to be established in April 2012, with an area of 1005 square meters. The laboratory has the world's leading analytical equipment, including Diane ion chromatography, liquid chromatography, PE atomic absorption spectrometer, agilent gas chromatograph, temperament combination instrument, American ionization chamber survey instrument and TNT12000 ray equipment performance and protection detector, and more than 100 large imported experimental equipment (sets). After three years, I have passed five laboratory metrological certifications, and have approved more than 700 CMA projects in total. I have achieved excellent results in all blind sample comparison and assessment of hubei provincial work safety supervision bureau, wuhan municipal work safety supervision bureau and provincial quality supervision bureau, and established a good reputation in hubei province. It is a private laboratory supported by the national key laboratory of organic geochemistry of the Chinese academy of sciences, and a private laboratory supported by the institute of pesticide and environmental toxicology of zhejiang university.