Most of the existing studies on the dynamic evolution of Chinese export product quality have been analyzed from an empirical perspective. lacking theoretical investigation of its intrinsic evolution rules. Therefore. this paper defines the connotation of export product quality improvement (quantitative change of export product quality) and export product quality upgrading (qualitative... https://safeersappliancers.shop/product-category/neff-n70-t59ft50x0-electric-induction-hob-black/