I Have a Method Called Dual Cultivation

[True and fake prince + gun repair + invincible in the same realm + cool writing + not overpowering the protagonist] In the previous life, Su Chen was a prince of a dynasty who was living abroad. After he was found, he tried his best to please his parents and relatives and get their approval. The eldest sister was guarding the border and was besieged by enemy troops. Su Chen, alone, killed countless enemy troops, forced them to retreat, and rescued the eldest sister. The second sister wanted to join the Sword Sect, so Su Chen broke into Jedi to get the elixir and shape the sword body for the second sister, but he was seriously injured. ... But no matter how hard he tried, he could not withstand Su Nian's frame-up in the end. His parents hated him, his sister hated him, and in the end, his biological parents dug out the Supreme Bone from his body alive and transplanted it into his adopted son. After resurrecting his life, Su Chenxin was already dead. In this life, he lives only for himself. Many years later, looking at Su Chen reaching the top Everyone in the Su family: "What did we miss?"