What does the 'Guo Ji' in cars represent?

1 Answers
DelSabrina
07/30/25 4:19am
Car 'Guo Ji' represents the emission standards. The 'Guo Ji' classification is differentiated by letters, with I corresponding to Guo 1, II to Guo 2, III to Guo 3, IV to Guo 4, V to Guo 5, and VI to Guo 6. Currently, Guo 6 is being implemented, which is divided into two phases: Guo 6a and Guo 6b. In cities like Beijing and Shanghai, vehicles are required to meet emission standards higher than Guo 5. Therefore, when purchasing a new or used car, it is necessary to choose a vehicle with Guo 5 or higher emission standards, otherwise, it may not be possible to complete the transfer or drive legally. In second and third-tier regions, vehicles must meet at least Guo 4 emission standards, so when buying a car, one should choose a vehicle with Guo 4 emission standards. In some more remote rural areas, vehicles with Guo 3 and Guo 2 standards are still acceptable.
Was this review help?
8
2
Share
More Forum Discussions

Can a Turbocharger Be Converted to a Supercharger?

It is possible to convert a turbocharger to a supercharger, but this modification will consume some of the engine's power. Below is an introduction to turbochargers and superchargers: 1. Turbocharger: A centrifugal compressor and a turbine are combined into a single unit, known as a turbocharger. The main difference between this and a gas turbine is that the turbocharger does not have a combustion chamber or its corresponding system. The turbine operates using the exhaust energy from a reciprocating internal combustion engine, and the compressed air provided by the centrifugal compressor serves as the charge for the reciprocating internal combustion engine. In a turbocharger, the compressor impeller and the turbine are mounted on the same rotating shaft, known as the rotor. Other components, such as seals and thrust washers, are also mounted on the same rotor shaft and rotate together. 2. Supercharger: A supercharger addresses the issue of reduced intake efficiency in naturally aspirated engines at high RPMs by focusing on the fundamental aspect of increasing the air pressure in the intake manifold to overcome valve interference resistance. Although the dimensions of the intake manifold, valves, and camshaft remain unchanged, the increased intake pressure allows more air to be forced into the combustion chamber during each valve opening period. Consequently, the fuel injection quantity can also be increased, resulting in greater engine performance compared to before the supercharging.
20
2
Share

What types of vehicles can be applied for with a newly obtained motor vehicle driver's license?

For a newly obtained motor vehicle driver's license, the following vehicle types can be applied for: urban buses, large trucks, small cars, small automatic transmission cars, low-speed trucks, three-wheeled cars, small automatic transmission passenger cars for the disabled, ordinary three-wheeled motorcycles, ordinary two-wheeled motorcycles, light motorcycles, wheeled self-propelled machinery, trolleybuses, and tramcars. The functions of a motor vehicle driver's license are as follows: 1. Purchasing train tickets: When buying train tickets, if you don't have your ID card or it's lost, you can present your driver's license to purchase train tickets. Since the driver's license is also verified with real-name authentication, it can prove your identity. However, you first need to use the driver's license to apply for a temporary ID card. 2. Hospital registration: When registering at a hospital, if you don't have your ID card, you can present your driver's license at the window to register, serving the same purpose as an ID card. 3. Hotel check-in: When traveling or on a business trip and needing to stay at a hotel, if you forget your ID card, you can present your driver's license as a substitute, which is both convenient and practical.
18
3
Share

Why Do Vehicles Need Urea?

Adding urea to vehicles helps optimize exhaust emissions. Here is an introduction to automotive urea: 1. Overview of automotive urea: Automotive urea is a liquid used in SCR (Selective Catalytic Reduction) technology to reduce nitrogen oxide pollution in diesel vehicle exhaust. Its composition consists of 32.5% high-purity urea and 67.5% deionized water. 2. Definition of automotive urea: It is applied in diesel engines. This liquid is used in SCR technology to reduce nitrogen oxide pollution in diesel vehicle exhaust. Its composition consists of 32.5% high-purity urea and 67.5% deionized water.
6
4
Share

Will the Fit feel unstable at 120 km/h on the highway?

The Fit generally does not feel unstable at 120 km/h on the highway, as long as there are no technical issues with the car. There is no car that truly feels 'unstable'—if it does, it may be due to unfamiliarity with handling it. Here’s a detailed explanation: 1. The meaning of 'unstable': One scenario is severe body roll when changing lanes, and another is significant vertical movement when passing over bumps. These situations do not necessarily mean the car is 'unstable,' as they are just the suspension system's response to external forces. Different cars have different suspension characteristics, leading to varied reactions. Once you become familiar with a car, you will adapt to its suspension behavior, and any movement will feel predictable, eliminating the sensation of being 'unstable.' 2. 'Unstable' is not strongly related to weight: On the contrary, a heavier car transfers more weight during emergency lane changes, increasing the pressure on the suspension and potentially worsening the suspension's deformation, making the car feel more 'unstable.'
16
3
Share

What Brand is Ferrari?

Ferrari is a world-renowned manufacturer of racing and sports cars, headquartered in Maranello, Italy. Founded by Enzo Ferrari in 1947, it primarily produces Formula 1 racing cars, race cars, and high-performance sports cars. Below is an introduction to the Ferrari brand: 1. Prancing Horse Logo: This is Ferrari's emblem. In addition to the familiar prancing horse, the Ferrari shield includes other elements. The yellow background is derived from the canary of Modena, commemorating Enzo Ferrari's hometown, while the green, white, and red colors at the top represent the Italian flag. 2. Current Ferrari Models: Roma, Portofino, etc.
12
2
Share

Is it legal for an SUV to tow a small trailer?

SUVs can tow trailers on the road, but they are only allowed to tow trailers with a total mass of less than 700 kilograms. Below are the two main characteristics of SUVs: 1. Sportiness: They must be capable of running, not only with quick acceleration and high top speed but also with high versatility and strong adaptability. 2. Multi-functionality: They can not only carry passengers with strong comfort but also have strong cargo-carrying capacity and towing ability. Below is extended information about SUVs: 1. Luggage height: Generally, the height of a roof luggage box should not exceed 0.5 meters. 2. Luggage rack: Vehicles not originally equipped with a luggage rack cannot install one, nor can they tie things to it. 3. Regulations: Different regions have varying regulations regarding tying items on the roof of an SUV. Generally, the width of the tied items should not exceed the width of the vehicle, and as long as the length and height are not too extreme and do not affect driving safety, it will not be treated as a violation.
15
5
Share
Cookie
Cookie Settings
© 2025 Servanan International Pte. Ltd.