How to use the wreckage of a space battleship in the galactic battleship center?

In the Moon Edition of Galaxy Battleship, when the commander's fleet attacks an enemy base, or is attacked, resulting in the loss of warships, 1 warship will be gained for every 1 warship lost. When the number of warship wrecks reaches 20, the main base shows a warship wreck construction center. The universe is the highest-level star domain in the galactic battleship, where commanders will experience the most unique gameplay.