After a while, Lao Cui came and asked Professor Dong to sit down as soon as he entered the room, and then asked Professor Dong to explain the situation in detail.

Professor Dong repeated what she had just said, and then described in detail what she had discovered.

Professor Dong's description revealed the young man to be quite unusual, and he even provided a psychological profile of his activities. Even Old Cui was captivated. He had never imagined someone could analyze a stranger so thoroughly; even he, a veteran police officer with over twenty years of experience, couldn't pull off such a thorough analysis. He couldn't wait to meet the young man and see if he lived up to Professor Dong's description.

Professor Dong's class has been going on non-stop since Old Cui came in. He started by talking about the young man, then moved on to the spies of the Republic of China, and then to the spies of certain countries, and then to how to steal intelligence and sabotage. Everyone was stunned by what they heard, and they all admired the easy-going Second Aunt, who was really amazing.

After talking in the classroom for more than an hour, Professor Dong finally stopped talking. Oh, she was so interested that she couldn't control herself and talked too much. She knew she had to keep a low profile, but she wanted to pass on her experience to these police officers so that they could catch more bad guys with their experience. Thinking of this, she felt relieved. As long as they could catch the bad guys, everything else would be fine. Then she agreed on a plan with Lao Cui and the others, deciding to just monitor the young man and not arrest him for the time being, so she followed them downstairs. (Dong Xiaomai's biological father was a very famous criminal investigation expert. Later, he was framed and imprisoned in the cowshed. The father and daughter will recognize each other. After knowing the truth, everyone believes that it is genetic. Dong Xiaomai learned to solve cases from her father when she was a child before she was abducted. This will be mentioned in the thirteenth volume.)

They pushed a cart from the backyard of the Public Security Bureau and went to the scrap collection station. When they arrived, the gatekeeper was still sitting at the door. Seeing Professor Dong coming again with a young man pushing a cart, they knew that there was more "business".

Professor Dong greeted him warmly and introduced him to the old man as her nephew. He nodded without saying anything. The gatekeeper even asked Professor Dong with a smile, "Is this your quiet nephew?"

"Of course not. He's like a gourd with its mouth sawed off. Sometimes he doesn't say a word for three days. It's so boring."

"Our Xiao Sun is the same. Hey, Xiao Sun is the young man this morning. He is young but calmer than an old man like me." The gatekeeper said with a smile.

"I came here to buy some more things. You know we're new here and we're in need of everything. We'll have to trouble you a lot lately."

The gatekeeper's old face was so bright with smile that it looked like a chrysanthemum. He hurriedly said that it was no trouble, asked them to wait for a moment, and got up to go to the yard of the purchasing station to call people.

In less than two minutes, the young man followed the gatekeeper out. It seemed that the gatekeeper had done this often before and was used to the young man's behavior.

Suihe hid his sharp eyes and pretended to be ignorant as he followed Professor Dong and even looked around the yard of the purchasing station. The young man was also looking at Suihe. Suihe pretended to look at a pile of rotten wood, but in fact he was taking in the terrain of the yard.

Professor Dong told the gatekeeper that his nephew had never been to the purchasing station and asked him to take a look. The gatekeeper treated customers with a warm and friendly attitude. After Suihe had walked around the yard and looked around enough, he took Professor Dong home.

We arrived at the old man's house and picked out a dining table and a few chairs. The flatbed cart was full. After bargaining for 10 yuan, we got it. We borrowed some rope from the old man to tie the table and chairs to the flatbed cart. Then, Suihe pushed Professor Dong and helped him out of the gatekeeper's yard.

Suihe was very alert. He suddenly turned around and found someone was watching them in the alley. Then he pretended not to notice anything and pushed the cart with Professor Dong towards home.