Investment Rating - The report maintains an "Overweight" rating for the environmental protection sector [2] Core Viewpoints - The iteration of the National VII emission standards is expected to expand the exhaust after-treatment market, with a projected market space of 100 billion yuan [3][7] - The National VII standards are accelerating, with significant advancements in technology routes, including EHC and tightly coupled SCR systems, which are anticipated to enhance product value [6][45] - Companies with leading technology and product competitiveness in the National VII industrial chain, such as Aikelan and Aofu Technology, are expected to benefit from this market expansion [3][10] Summary by Sections Emission Standards and Market Potential - Mobile sources are a significant contributor to air pollution in China, with motor vehicle emissions accounting for 72% of total emissions [4][12] - The National VII standards are currently in the third phase of pre-research, with the aim to further reduce NOx and particulate matter emissions [5][22] - The exhaust after-treatment market is projected to reach 100 billion yuan, driven by the transition from National VI to National VII standards [7][47] Technological Advancements - The National VII standards will likely introduce new technologies to improve NOx reduction and cold start control, enhancing the efficiency of exhaust after-treatment systems [6][45] - The use of EHC technology is expected to significantly improve SCR conversion efficiency, meeting stringent emission regulations [33][45] Recommended Companies - Aikelan (300816 CH) is recommended with a "Buy" rating, targeting a price of 48.40 yuan, due to its strong position in the National VII market and technological advancements [10][52] - Aofu Technology (688021 CH) is rated "Overweight," with a target price of 21.00 yuan, focusing on its development in the ceramic technology sector for air pollution control [10][52]