Double Wear, Start By Becoming A Bad Guy

Chen Feng, an ordinary citizen, accidentally obtained a picture scroll that allowed him to travel to another world.
Through the ability of the scroll, he began to resell items back and forth between the two worlds.
Ordinary ores obtained in another world and transported to the modern world immediately became strategic materials for the Military.
But inconspicuous small items in the modern world are bought at high prices instantly when placed in another world...
Originally, Chen Feng just wanted to be a stable man and live a peaceful life,
but as he explored the other world in depth, he discovered that this world not only has warriors, but also immortals.
Now Chen Feng is not calm at all...
PS: This book is also known as "If you don't surrender your ability, you are afraid of death" and "On whether golden elixir monks can withstand nuclear bombs".