When I Was Seven Years Old, Others Controlled Animals While I Built Mechas.

Lin Binbin traveled to a world of beast control and became a seven-year-old child. This sounds good, but his grandfather was in the wrong team and was beheaded. Lin Binbin became the grandson of a criminal overnight. He could only be forced to go into exile and do the most menial jobs until the system was activated. Other people's spiritual beasts, the turtle, the orangutan king, and the fire phoenix, but Lin Binbin's were made of black iron and equipped with high-end laser cannons. They were not afraid of killing gods or demons. The only drawback... Was that it was a little expensive.