1、 Policies and regulations: the hanging 'tight spell'

Nowadays, the world is vigorously promoting increasingly strict standards for automobile exhaust emissions. Take China as an example, the National VI standard has strict restrictions on particulate matter emissions, and the particulate matter quantity limit for Stage 6B in China is further stricter than that for Stage 6A. For car companies, particle filters have become a key and indispensable means to ensure that vehicles meet these standards. In Europe, Euro 6 emission standards also require vehicles to be equipped with similar devices to control particulate matter emissions. For example, in Germany, in order to drive cars on the road, they must meet Euro 6 standards, which has led German car companies such as Volkswagen, BMW, Mercedes Benz, etc. to install particle filters on most of their models. In the United States, California, as one of the regions with the strictest environmental requirements, implements strict emission standards for vehicle particulate matter emissions, prompting car manufacturers to widely adopt particulate trap technology to meet regulatory requirements. As long as these high standard emission regulations continue to exist, particle traps will continue to shoulder their mission and be difficult to retire.