Source

👀 Nayuta Space updated the design of Space Chaser 1 (XuanNiao-1). Steering fins instead of grid fins on the 1st stage (New Glenn) Caught by a tower with “chopsticks” (Starship) Nayuta estimates 2~4 tonnes of capacity increase with the new design https://mp.weixin.qq.com/s/BlfIySbYsPCBCFSLfPYydg

It looks like a methalox Falcon 9 clone with New Glenn’s fins and a Starship-style chopsticks booster catch.