Infinitely extended rails, each person has an endless train, through the scorching heat, extreme cold, the end of the world...

Yu Qian'an can see his luck attributes. When he is lucky, he will make great progress, and when he is unlucky, he will be as steady as an old dog!

Train survival rules: 1. You must arrive at the designated station at the specified time, otherwise you will be eliminated.

2. Be careful of monsters climbing onto your train.

3. There may be survival resources in the resource box, or it may be dangerous. It all depends on luck.

4. Don't trust anyone...

Melon-eating crowd: "What is that big black pipe erected on Yu Qian'an's train? Another chimney?"

Melon-eating crowd 2: "Bullshit chimney! That's an intercontinental missile! Super control!!! I report Yu Qian'an for cheating!"

After the Catastrophe, every rule in the world was rewritten.

In the Age of Black Iron, steel, iron, steam engines and fighting force became the crux in which human beings depended on to survive.

A commoner boy by the name Zhang Tie was selected by the gods of fortune and was gifted a small tree which could constantly produce various marvelous fruits. At the same time, Zhang Tie was thrown into the flames of war, a three-hundred-year war between the humans and monsters on the vacant continent. Using crystals to tap into the potentials of the human body, one must cultivate to become stronger.

The thrilling legends of mysterious clans, secrets of Oriental fantasies, numerous treasures and legacies in the underground world — All in the Castle of Black Iron!