Chu Jin was very excited about the grenade and said, "Ah Ying, can you write me a copy of the manufacturing process of the grenade?"
Chu Ying asked strangely, "Brother, what do you want with this?"
Chujin smiled and said, "Just curious."
Chu Ying didn't agree. He shook his head and said, "Brother, this kind of thing is too destructive and dangerous. We don't have to go to the battlefield to kill enemies. We don't need it."
Seeing Chu Ying, Chu Jin could only give up.
After two days, Chu Jin took Yu Xin and others to find Doctor Zhong. Before leaving, he told Chu Ying: "You must not tell your father about Lingshui. Remember