China's self-developed solid-fuel rocket engine with the world's largest thrust had a successful test run at Xi'an, northwest China's Shannxi Province on October 19, 2021. The engine has a diameter of 3.5 meters and a maximum thrust of 500 tons powered by 150 tons of solid fuel. It also applies technologies such as a high-performance fiber composite shell, an integral-casting combustion chamber of high load and an oversize nozzle. It is the most powerful solid rocket engine in the world to date.