A team at Dalian University of Technology has achieved mass production of monolithic rocket propellant tank domes over 2 meters in diameter using their globally-first "cryogenic forming technology," reducing manufacturing cycle time by over 90% to an annual output of approximately 1,000 units. Traditional methods suffer from numerous welds, poor reliability, material waste, and long cycles. This technology leverages the "dual-enhancement effect" of certain aluminum alloys—where both elongation and hardening increase simultaneously at cryogenic temperatures. Using custom large-scale cryogenic forming equipment, liquid nitrogen at -190°C enables "on-demand, conformal, controllable cooling," producing large monolithic components with a wall thickness of just 4 mm and a thickness deviation of less than 0.3 mm in a single forming step. This approach addresses industry pain points of excessive welds, material waste, and long lead times, and has already been successfully launched aboard the Long March 12 and Long March 7A Y14 rockets, promising cost reductions and efficiency gains for high-frequency commercial space launches.