Kunlun Star is a brand of automotive urea developed by PetroChina Lubricants Company, which is suitable for China IV and China V exhaust gas purification systems, reducing the nitrogen oxide content of engine exhaust, effectively protecting the SCR purification system of diesel vehicles, and ensuring the efficient operation of vehicles. Kunlun Star Diesel Exhaust Gas Purification Liquid passed the CGT certification in 2017 and is the earliest brand in China to pass this certification.