Chapter 3621 (1/2)

Lu Yu ignored him, but set his eyes on the stone bricks of the city wall.

”This is not the craft of the present era, this is the forging method of the medieval period. There were a large number of black dragon iron in the medieval period. When making the wall bricks and stones, these iron filings would be mixed into it to make the wall indestructible, even with a spirit stone gun!”

Lu Yu put his hand on the wall and rubbed the feeling from the solid wall, frowning.

He has learned from ancient times to modern times. Naturally, he knows something that ordinary people don't know.

The black dragon iron was cut off later. Only the royal family and a few families owned a small part. It can only be used to temper some precious magic weapons and can not be used to forge the city wall.

At present, only some top cities, such as Dijing and Xiliang, will be poured into the wall tiles with extraterritorial meteorite iron.

But even in the middle ages, black dragon iron was also rare.

It is by no means an ordinary city that can cast walls with such precious materials.

”Wait! Xinlingxing is around Xiliang mansion. In medieval times, there were few walls that could melt black dragon iron. Is this the site of a middle ancient city pool?”

Lu Yu feels his heart can't help beating.

The scuffle in the Middle Ages obliterated many cities that were once brilliant for a time.

There are many greedy treasures hidden in these ancient Chinese pools.

Even some famous cities have enough treasures to attract the strong at the level of Daojun.

This is definitely a great fortune!

Lu Yu even felt that the fate he had cultivated had changed his life style, making everything he encountered incredible.

All the way along the city wall, soon Lu Yu came to a huge city gate.

The city gate was completely closed, only a lonely city gate stood completely in front of him, and the rest had no superfluous decoration. The surrounding is still cold and strict walls, which firmly guard the things inside the city wall.