China's car market with distinctive characteristics of urea, first of all, China's vast territory, complicated climate, uneven economic development in the region. Secondly, the current car with urea market turmoil, fake breed, the larger brand management more difficult. Third, the car belongs to a liquid product with urea, higher logistics costs. Fourth, vehicle exhaust gas treatment with urea as environmentally friendly products, by large national policy implications. "Dean Institute of Technology Sichuan Meifeng Chemical Co. Tao Jiaming Road. Market needs further specification as heavy vehicles to achieve mainstream technology roadmap country Ⅳ emissions, SCR technology must make use of car exhaust products with urea nitrogen oxides treatment. Long-term use of high-quality non-urea exhaust treatment products will not only greatly reduced, but also cause damage to the vehicle itself. Therefore, the use of urea vehicles become an important benchmark test country Ⅳ standard implementation. guarantee vehicle urea Quality is not only the needs of production enterprises to strengthen control of the production, packaging, transportation, storage and so the whole process, but also need the government to strengthen regulation.