When did China IV vehicles start?

[DiCassidy]

China IV emission standards began in 2011 and lasted until the implementation of China V standards in 2018. Therefore, vehicles produced between 2011 and 2017 all comply with China IV standards. The China IV standard requires approximately 50% lower emissions of various pollutants compared to China III. Currently, with China VI standards approaching, vehicles meeting China III emissions are facing mandatory retirement. Here is more information: 1. Different countries and regions adopt varying emission standards based on their actual conditions. For example, the U.S. has U.S. standards, Europe has Euro standards (Euro IV, Euro V, etc.), and China has national standards (China IV, China V, etc.). 2. There are three main test cycles for passenger vehicle emissions: the EU's NEDC cycle, the U.S.'s FTP75 cycle, and Japan's JC08 cycle.