Starting from iron smelting

This book is a science and technology immortality story. It tells the story of a man who, with the power of modern technology, dominates the immortality world and eventually becomes a great man of the human race, protecting all creatures in the world. The progress of this book is relatively slow. It is a science and technology, immortality, and farming story. The protagonist gets everything by himself. The protagonist focuses on his career, there is no heroine, there is no system, no so-called leapfrogging, and no system rewards. What he cultivates is the immortal of materialism, and what he proves is the way of modern technology. ...