Abstract: Amid global green transition and "dual-carbon" goals, Weichai leads high-power natural gas engine development after 26 years of research, with 800,000 units sold by Feb 2025. Its engines iterated from 1.0 to 4.0, solving key issues: emission compliance, efficiency, and extreme conditions. The 2025 WP16NG4.0, "world’s strongest gas power" (750hp), boosts climbing by 25% with 6% lower gas consumption, saving ¥150,000/year in mountains. Through "tech pre-research + scenario focus," Weichai advances eco-friendly, efficient commercial mobility.