The influence of long-distance transport on atmospheric background ozone and the variations in ozone and its regional representativeness at atmospheric background stations in China are reviewed.Studies results on the impact of long-distance transport of ozone from various pollution sources on ozone in China are quite different, and the source and recipient regions with the most significant contribution are also controversial.In adddtion, few studies have considered the ozone contribution from the stratosphere to the troposphere, which is of significant importance in the background regions with few precursor emissions.Each atmospheric background observation station in China has the same maximum monthly distribution of tropospheric ozone column concentration with the surrounding areas in a certain range.However, the analysis of the surface ozone region characteristics significantly related to human health has not been carried out.In view of the limitations of the research methods, the complex causes of the regional ozone variations have not been deeply revealed.Based on the current research progress and deficiency, the scientific problems to be solved include making use of the source-tagging results of global atmospheric chemistry-circulation model to quantitatively determine the contributions of ozone originating from various regions of the world on the atmospheric background ozone, then evaluating the seasonal variations in surface ozone its regional representativeness at the six atmospheric background stations in China.