
Starting from July 1, 2020, urban vehicles sold and registered (including those transferred from other provinces) in Shanghai must comply with the China VIa phase emission standard requirements. Below is relevant information about the China VI standard: 1. China VI Standard: The China VI emission standard refers to the sixth-phase national standard for motor vehicle pollutant emissions testing. The requirements of the China VI emission standard are more stringent than those of the China V standard, including a 50% reduction in carbon monoxide limits, a 50% reduction in total hydrocarbons and non-methane hydrocarbon limits, and a 42% reduction in nitrogen oxide emissions. 2. Advantages: It can effectively shorten the time for replacing new vehicles.

I remember that Shanghai implemented the China VI emission standard officially starting on July 1, 2019. It happened to coincide with the rainy season, and several of my friends were scrambling to buy China V vehicles, fearing they wouldn't be able to get license plates after the new regulations. This timeline was actually a full year earlier than the nationwide implementation on July 1, 2020. Shanghai has always been at the forefront of environmental policies. Now it's 2023, and China VI vehicles are everywhere on the streets, even transforming the market—China V vehicles from other regions simply can't enter. Just the other day, while helping my cousin look for a car, the salesperson at the 4S store specifically reminded us that China VI b is now the standard.

Last year when I accompanied my colleague to buy a car, I specifically researched this matter. Starting from July 1, 2019, new cars in Shanghai must comply with the China 6a standard, and then in July last year, it was upgraded to the stricter China 6b. Special attention should be paid to this phased implementation: first targeting light-duty gasoline vehicles, then gradually covering all vehicle types. Now, any new car that wants to be registered in Shanghai must have the latest China 6b label, and even the inventory cars at 4S stores have been replaced with new models equipped with particulate filters. A friend of mine just had his car's emission parameters checked during registration last week, and it almost failed.

This topic often comes up in our neighborhood car owners' group chat. Shanghai fully implemented China 6 emission standards back in July 2019, a full year ahead of the national schedule. I remember when the was first introduced, many car owners rushed to upgrade their exhaust treatment systems overnight. The current stricter China 6b standard, implemented last July, cuts nitrogen oxide emission requirements by half. When I visited the auto repair shop recently, the mechanic mentioned this is now a key focus during annual inspections, with many older vehicles requiring DPF installations to meet the standard.

Last month when helping my son choose a car, the director explained the timeline in detail: Shanghai implemented China 6a on July 1, 2019, and upgraded to China 6b on July 1 last year. He reminded us to be especially careful when buying used cars now, as out-of-town China 5 vehicles simply cannot be transferred. That day in the 4S store parking lot, I saw more than a dozen stock cars with yellow warning labels, all China 5 vehicles produced right before the June 2019 deadline, now only usable as display pieces.

A friend who handles vehicle annual inspections mentioned that Shanghai's China VI emission standards are being implemented in two phases: starting with China VIa for light-duty vehicles in July 2019, and transitioning to China VIb by July 2023. Notably, this year's inspections introduced new changes—the exhaust gas analyzer is now directly linked to a database, even measuring particulate emissions down to the microgram. Once, an older SUV owner had to upgrade his catalytic converter to a newer model just to pass, costing over 4,000 yuan in modifications alone.


