After Zuo Dai accepted the order, he immediately began preparations for the mercury fulminate factory.

The location of this factory is more remote and the security is tighter.

Even in order to meet the confidentiality requirements, many production links are not included.

After such a layout, unless someone leaks secrets in all aspects, the preparation method of mercury fulminate will be foolproof.

At the same time that Zuo Mengeng was producing mercury fulminate, a carriage drove leisurely into Linqing City and finally stopped in front of the Bingbei Road Yamen.

After Zhang Jimeng got the news, he came out quickly and welcomed an old man who was nearly sixty years old down.

"Teacher, why are you here?"

The old man has a leisurely demeanor, and nothing lingers in his mind.

"I resigned."

"What?"

Zhang Jimeng was shocked.

"Teacher finally recovered from his illness. It's time for him to make great achievements. How can he resign?"

The old man scratched his beard and didn't care.

"It's just a mere envoy to Nanjing who is bored and wasting his time."

Without waiting for Zhang Jimeng to say anything else, he asked: "Where is the boy who made the self-made fire gun?"

Zhang Jimeng was extremely helpless.

"The teacher's temper is still the same as before."

The old man blew his beard and stared, very angry.

"Stop talking nonsense and take me to see him quickly."

So Zhang Jimeng took the old man to the military camp and appeared in front of Zuo Mengeng.

Zuo Mengeng was confused and didn't know what Zhang Jimeng meant by bringing an old man here.

The old man looked at him as if he were looking at a peerless treasure, smiling as if he could take out the golden ax at any time.
Chapter completed!