Established in mid-2024, Astronstone announced May 29 it had secured more than 100 million yuan ($13.9 million) in part for the development of its AS-1 (Astronstone-1) stainless steel, methane-liquid oxygen reusable launch vehicle, with a “chopsticks” system for first stage recovery.

The AS-1 rocket features a diameter of 4.2 meters, a length of 70m and a takeoff mass of 570,000 kilograms. It can carry up to 15,700 kg to low Earth orbit in expendable mode, or 10,000 kg in reusable mode. Astronstone claims the AS-1 price per kg launched will be 10,000 yuan ($1,340) when reused, or 20,000 yuan ($2,680) when the first stage is expended. Astronstone also has future plans for a much larger, 8.0-meter-diameter AS-2 rocket.

The AS-1 rocket will be powered by a customized version of the 80-ton-thrust Longyun engine developed by commercial rocket engine maker Jiuzhou Yunjian (JZYJ). JZYJ also supplied Longyun engines to Sepoch, which this week conducted a vertical takeoff and splashdown test with its own stainless steel test article.