On February 26, 2006 (January 29, 2006 lunar calendar), our country's first Euro IV diesel engine with independent intellectual property rights came out. Yuchai Group, our country's largest diesel engine manufacturer, launched our country's first Euro IV diesel engine YC6L-40 with independent intellectual property rights on the 26th. This was less than 3 months after the introduction of the National III standard (equivalent to Euro III), and most Chinese diesel engine companies were still preparing for the launch of Euro III products, which caused a strong response. The Euro IV diesel engine unveiled at the "2006 Strategy Release Conference" held by Yuchai adopts electronically controlled injection technology and emission post-treatment technology, which not only meets the Euro IV standard, but also has good power and economy. It has the advantages of high power, low emission, low noise and high reliability, and is suitable for power needs such as luxury buses and city buses. Yuchai presented the engine to Beijing Public Transport Corporation at the conference site, and held a launch ceremony for Yuchai's 1000th Euro III diesel engine, taking the first step to develop China's "green power" market starting from helping the Green Olympics.