张诚第一次踏上紫禁城的土地， Dates back to 2023, but the world he saw here was so different from his own. The air was thick with the smell of gunpowder and iron, and the bustling workers in the workshops were busy forging weapons for the army. He was a commoner, but his presence here was no less important than that of the prince himself.

The workshop was hidden in the depths of the palace, away from the public eye. It was here that the most advanced weapons in the empire were made. The workers were all skilled craftsmen, who had been trained since childhood. They worked tirelessly, their hands moving with a rhythm that only came with years of practice.

The master of the workshop was an old man named Li. He was a man of great wisdom and experience, and he had been the master of the workshop for over 30 years. He was the one who taught Zhang Cheng how to make weapons, and he had great confidence in his abilities.

"Master Li, I've been working here for several months, but I still can't make a weapon as good as yours," Zhang Cheng said, looking at the weapon in his hand with a sense of frustration.