This program addresses China's needs for a space transportation system. We have introduced a new concept of cross-domain efficient intelligent flight, developed an unsteady aerodynamic model for cross-domain variable-structure flight, and established an intelligent control theory for cross-domain variable structure reusable aircraft. Additionally, we have achieved breakthroughs in key technologies such as active thermal protection for variable-structure aircraft, variable configuration mechanism-structural design, active flow control, and electromagnetic force thermal environment simulation and scientific testing systems. These advancements provide essential theories, methods, technologies, and a talent pool to support the successful implementation of "China's Space Transportation System Development Plan."