Before leaving the capital, Xu Di had a good talk with his uncle Zhang and asked him to send someone to investigate the matter of Aunt Zhu back then. In recent years, the Xu family has been doing well in Hexi and their development has been quite smooth. However, the Xu family has never forgotten why they came to this place. Unless they find those who harmed the original owner, they will always have a knife hanging over their heads.

This matter could only be carried out in secret. Zhang's eldest uncle asked around for a while and finally got some clues. When Aunt Zhu was first sold into the brothel, a fire broke out there and several people died. It was said that several men in black were captured, but unfortunately they committed suicide by poison on the spot. Because there were no leads, they did not investigate further.

Not many people knew about this back then. To the outside world, it was just said that the brothel had been robbed. It was Zhang's eldest uncle who was lucky enough to find out about a person who had worked in the kitchen of the brothel back then. This person was only a teenager at the time, and is now over fifty years old. He originally kept quiet about those things, but Zhang's eldest uncle offered him a lot of money, and he had children and grandchildren to support, so he told them what happened back then.

On the surface, the letter appears to be just an ordinary greeting. Next to the letter is a thick sheet of paper, about the same size as the letter, but with some spaces cut out. Once the thick paper is placed on top of the letter, the words within the squares are the actual message to be exchanged.

Never underestimate an unknown enemy. This is a profound lesson Xu Di learned from years of training. He never underestimates anyone around him. Xu Di felt that he now had some strength. The key was that someone from the Zhang family had returned to the capital, had help, and had money. It was the perfect time to investigate secretly.

Xu Di had already written down all the real information from the letter. Zhang Zhaoci looked at the thick paper with many small square grids pulled out and asked with a smile, "You're really careful. Didn't your uncle think you were being silly?"

Xu Di said, "How can this be a joke? My goodness, this isn't a TV drama, we're living real life here. Better safe than sorry. My uncle saw it and said we could use it in their business's correspondence to prevent others from finding out their business's secrets."

Zhang Zhaoci said, "Well, you've found a good solution for your uncle."

Xu Rao took the letter from Xu Di's hand, looked at it, and said, "I think the fire at the music hall and those men in black are not simple matters. However, more than 30 years have passed, and we won't find anything if we try to investigate again. Tell your uncle to send someone to keep a close eye on Aunt Zhu. Aunt Zhu must have some way of communicating with people outside the mansion."

Xu Di asked him, somewhat puzzled, "Dad, how can you be so sure?"

Xu Rao said, "I think it's strange that he would send his own son to burn incense outside the city when the weather is bad, and he even brought his wife and children. This is obviously not normal. Wei Lang told me that several princes in the capital have been behaving themselves for a while, but recently they have been making some unusual moves. We have to be careful."

Xu Di nodded and said, "I know that. I'll write a letter to my uncle when I get back, and I'll have someone take it back to him."

Zhang Zhaoci sighed and said, "I feel like we're just like in a TV drama right now, with all the ups and downs in the plot."

Xu Di said, "We didn't want things to be like this either. Who doesn't want to live a peaceful and stable life? It's not that I had no choice. If we don't make things this way, who knows what losses we'll suffer later? We've gone from a family of three to a family of five, plus Granny Lu, that's six people. So there are some things we have to find out."

Hearing this, Zhang Zhaoci's eyes lit up and he said, "You mentioned Granny Lu. Granny Lu must know about these things from back then. Xu Di, go and see if Granny Lu is asleep. If she isn't, invite her over. Let's hear what Granny Lu has to say."

Xu Di quickly got off the kang (heated brick bed) and put on his shoes. He was going to take care of Granny Lu in her old age. Granny Lu was an elder in the family. Now that his family was surrounded by dangers, Granny Lu couldn't stay out of it.

Granny Lu really wasn't asleep yet. She was sleeping in the same room as Xu Bai. Xu Bai had been busy all day and was already asleep. Granny Lu was sitting on the kang (a heated brick bed) sewing a pair of deerskin boots for Xu Bai, lined with rabbit fur and with thick soles. They would be waterproof and warm to wear out in the snow.

Qingmiao and Qingsui were sleeping on the kang in the outer room. When they heard Xu Di knocking on the door, they quickly put on their clothes and opened the door. When Granny Lu heard the knocking, she had already put on her shoes and came to the outer room. Xu Di said, "Granny, I have some things I would like to ask you."

Granny Lu quickly got dressed and followed Xu Di towards the main house in the front courtyard.

The Zhang family came during the day, and Granny Lu had seen them and knew that the Zhang family had sent a letter. Since Xu Di was still coming to see her so late, there must be something wrong.

Seeing the family of three staying up late to guard a letter, Granny Lu immediately took off her shoes and sat on the kang (a heated brick bed), asking, "What happened?"

Xu Di then recounted the accident that had happened to his family of three, focusing on how they hid and saw people carefully searching the place where the carriage had fallen.

Xu Di said, "Granny, I don't believe this was an accident, but we don't know who wants to harm us. My parents and I have thought about it for a long time, and we've thought about everyone in the mansion. We all think that Aunt Zhu is a bit strange."

Granny Lu said, "Your concubine Zhu is indeed quite strange in your eyes. After all, she was a famous person in the capital back then, and she was in love with the Crown Prince at the time."

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