Chinese commercial space firm Deep Blue Aerospace completes largest liquid rocket tank

The significance lies less in the tank size than in the manufacturing cadence: with both stages now largely built out, Deep Blue is shifting from design to production execution, a transition where many commercial launch startups stall. The 5-meter diameter also places the Nebula-2 in a heavier lift class than most Chinese commercial vehicles, putting the firm in more direct competition with state-backed launch capacity. Whether this structural milestone translates into an integrated rocket ready for testing is the open question, and the pace of the next production and assembly steps is worth watching.