Why don't domestically produced China 6B vehicles come with GPF?

[VonRhett]

GPF can effectively filter out fine particulate matter in exhaust emissions, which is beneficial for both the environment and motor vehicles. Diesel models require regular cleaning of the particulate filter, while gasoline vehicles do not. Here is the relevant introduction: 1. Definition of GPF: The Gasoline Particulate Filter (GPF) is a ceramic filter installed in the diesel engine emission system that can capture particulate emissions before they enter the atmosphere. 2. Basic working principle: For example, if the diesel particulate filter is coated with metals such as platinum, rhodium, and palladium, the black smoke containing carbon particles emitted by the diesel engine enters the engine exhaust particulate trap through a dedicated pipeline. After passing through its densely arranged bag-type filter, the carbon smoke particles are adsorbed on the filter made of metal fiber felt. When the adsorption of particles reaches a certain level, the burner at the end automatically ignites and burns, turning the adsorbed carbon smoke particles into harmless carbon dioxide that is then released.