City: Get the Black Technology System at the Beginning

The book has its own Yan Ruyu, and the book has its own golden house. Lin Ning, who traveled to a parallel world, suddenly obtained a learning system, and completed various learning tasks to obtain advanced black technology. Have you ever thought about how surprised Country M was when Lin Ning was able to mass-produce Iron Man? ! ! This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.