The high-time-resolution atmospheric mixing ratio data were sampled at Peking University. The data was analyzed and led to the conclusion that HCFC-22 was the proper reference substance; CO, the idiomatic reference, was not suitable for interspecies correlation analysis when dealing with data from urban districts. Based on the observation data of HCFC-142 b and HCFC-22 gained from four representative cities(Beijing, Hangzhou, Lanzhou and Guangzhou) in four seasons, China's HCFC-142 b emission in 2012 was ca...