The Reborn Man with Swords in the Apocalypse Hoards Billions of Supplies

Apocalyptic rebirth + safe fortress + force legion + single female protagonist. Xiao Qiang, who was beaten by four king-level superpowers in his previous life, awakened dual-system superpowers after being reborn. He subdued the first beast of the thunder system, the wind thunder beast. The reborn person obtained billions of materials, collected spiritual stones, and raised spiritual beasts in captivity. He built a doomsday steel fortress and established a Dawn City defense army! In the last days, we need people and supplies. Do you want to come and seek refuge? Sorry, it's full!