This book is also called "The Road to a Powerful Country Through Black Technology". (Parallel world)
Lingyun, a genius scientific research boss, traveled back in time to the turbulent modern times, disguised himself as a man and transformed into a rich man. He was helpless due to lack of equipment and materials. Thanks to the modern black technology system binding, you have unlimited backpacks and ten thousand times the ability to reproduce. You can copy tens of thousands of self-developed items with one click. Use top technology to drive away foreign enemies and protect the sustainability of China's mountains and rivers.
