Although Xiao Tianyao didn’t write a letter, he sent a topaz seal to Lin Chujiu. Out of courtesy, Lin Chujiu was embarrassed to just send one letter, but in a short time, she couldn’t find anything good. So she found a red rope, tied a safe knot, and added a white jade. The safety knot was put in the Luban lock together with the letter.

When Su Cha got the letter, he found that the usual thin letter turned into a piece of wood. Holding the piece of wood that obviously looked like just a piece of wood. Su Cha was confused: “What is this? A present you will give to Wangye, Wangfei?”

Xiao Tianyao gave her a brocade box, but Lin Chujiu will give a piece of wood?

What does this couple trying to play?

Is this love between husband and wife? Why can’t he understand it?

Lin Chujiu said “Mmm”. Su Cha felt wrong, so he asked another question: “Wangfei, did you open the brocade box?” Such a simple nine-square grid box, was Lin Chujiu stupid?

Lin Chujiu didn’t want to take care of Su Cha. But hearing his words, she couldn’t help but have him a bad look: “It’s terrible to have no culture. Susu, don’t say that you know me when you go out. It’s shameful.”

“What should I be ashamed of? A box made out of a few pieces of wood, what’s so strange about it?” Su Cha held the wooden block in his hand and looked around it. He was still confused: “What is this? It looks like a box but not like a box. Is it hollow inside?”

Aren’t they just sending a letter? He wouldn’t peek. Is this couple so bored?

“A Luban lock, which contains my letter to wangye.” Lin Chujiu was afraid that Su Cha will doubt her IQ and talk about it to others. So, she kindly announced what it was.

“What? This is the legendary Luban lock?” Su Cha’s eyes lit up. He couldn’t believe it when he heard Lin Chujiu’s answer. Su Cha tried to unlock it, but even after playing with for a long time, he still can’t solve it: “How can I open it?”

“If you can open it casually, it will not be the Luban lock with twelve pillars.” Lin Chujiu was not looking down on Su Cha, it’s just this Luban lock was really difficult to solve. She could only solve the nine pillars and twelve pillars after watching others solved it.

“Twelve-pillar Luban Lock? Wangfei, where did you find this?” Su Cha looked at Lin Chujiu with bright eyes.

This Luban lock was a good thing. With the use of Luban lock, it will be safer to send out a message in the future. And once they learned the Luban lock mechanism, it will be easier to make other secret mechanisms.

“I let our people made it. Are you interested?” Lin Chujiu asked and raised an eyebrow. Seeing Su Cha strongly nodded his head, Lin Chujiu generously said: “Ask Housekeeper Cao give you a set.” Su Cha will naturally not let this opportunity pass.

“I’ll ask Housekeeper Cao.” After getting Lin Chujiu’s words, Su Cha turned and went to Housekeeper Cao. He smoothly got a new set of twelve-pillar locks from the carpenter, but… …

“How do we solve this?” The three of them studied for a long time together and studied the set that Lin Chujiu unlocked, but they still couldn’t find a way.

“There must be a trick in it. It will be easy after mastering it.” Su Cha looked at the ‘lock’ in his hand, then picked up the other wooden stick. He continued drawing it until the sky turned dark, but there was still no progress.

“Should I just ask wangfei?” Holding the twelve-pillar blocks, Su Cha decided to ask shamelessly. However, when he arrived at the door, the door was closed. The guard blocked Su Cha and said: “Wangfei said, if Su Gongzi came to ask about Luban lock, there’s nothing to talk about. Wangfei will not reveal the answer until Wangye solved it.”

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