Chapter 421: Judgement was right

Shi Qingluo realized that the northern border was like a sieve, with so many people trying to take advantage of the loopholes.

"I'll start teaching them how to make canned food tomorrow, as well as candles and soap."

"You should have found some trustworthy people, right?" she asked.

Xiao Hanzheng nodded. "I've sieved out the people in the workshops several times. I'll find an excuse to get rid of the spies.

"You can teach those who are trustworthy what to do. I'll also have people keep an eye on them and not let them leak it.

"If the process can be separated, it's best to divide it for several groups of people to do it separately."

"Yes, I think so too," Shi Qingluo said with a smile.

"By the way, you know a little about the art of invisibility right? Taoist master Chang Wing is better at this. You can talk to him more about this."