When Xiao Yi took out the electric blanket and small battery, he also expressed his current speculation: "The polar night is probably coming soon. This can generate electricity by exercising. Although this electric blanket may not be very hot, it should not be a problem for me to sleep at night."

Next, he prepared various high-calorie snacks and dried fruits for Yu Wei. Especially the milk powder, Yu Wei couldn't wait to make a cup, and the taste was almost the same as fresh milk. Xiao Yi's care for Yu Wei was truly attentive and meticulous. After packing up Yu Wei's things, Yu Wei returned to her dormitory in the afternoon.

Xiao Yi sat with Yu Wei and Grandpa for a while, then took Yu Wei's things and sent her back to the dormitory of the institute. When he arrived at Yu Wei's dormitory, Xiao Yi found that the temperature inside was only around 0 degrees, and the room was very cold. Xiao Yi looked around and began to prepare to dismantle the bed. It was a single room, but only about 20 square meters, with a small bathroom. Because the temperature was very low, the water pipes would freeze from time to time.

Xiao Yi really wanted Yu Wei to live in his own house, but he was often away from the base, possibly on missions. What if her uncle, aunt, and the so-called Finance Department people were to trouble Yu Wei in his absence? Xiao Yi thought for a moment, then asked Yu Wei to stand aside, draped in her coat, while he prepared to clean up the house. The base was gradually adopting combustion-based heating, so every room had a chimney. Xiao Yi first dismantled the bed and set it aside, then began to dig out the items from the space. Using readily available cement and bricks, he quickly built a low kang, two meters long and 1.8 meters wide. On the other side, he installed a small stove. Atop the stove, a small pot could be placed, perfect for boiling water or cooking. Near the door, Xiao Yi placed an iron shelf for Yu Wei, on which he placed several large boxes of honeycomb briquettes. The briquettes were all purchased directly from the source by Xiao Yi, and they were all of the highest quality. For the chimney, Xiao Yi simply cut a hole in the wall and installed a smoke barrier. When the coal flames were lit, the smoke damper was opened to allow all the smoke to enter the flue. After the combustion was complete, the smoke damper was closed to maintain the temperature. The room was not very large, and soon after Xiao Yi lit the stove, the temperature in the room gradually rose. The flames burned and dried the bricks and cement. Xiao Yi then found a waterproof mat from the space and spread it on top. It was clean and comfortable. He put the quilt from the bed on top. At least for now, it should not be a big problem to withstand the outside temperature. The clanging sounds inside still attracted others' attention. Yu Wei lived in the last room at the end of the corridor. Next door was Ye Ming, and across from her was a couple who lived in the research institute. Both were in their 30s and had no children. They mainly conducted research on mutant animals. They listened in the room for a long time, but couldn't resist their curiosity and knocked on Yu Wei's door. Yu Wei hesitated and looked at Xiao Yi. Xiao Yi used the bed he had just removed to block the scene inside the room before letting Yu Wei open the door. The moment the door was opened, the cold air outside kept rushing into the house, and bursts of "white smoke" could be clearly seen.

The visitor was very surprised when he saw Yu Wei. He said this while trying to come in: "What are you doing in this room? We've been arguing for a long time. Why is it so warm?" Yu Wei was afraid of causing trouble and didn't want her to go in. She simply walked out wrapped in a coat, then closed the door and said in a distant voice: "Ah, Professor Xin, nothing, my boyfriend came to help me clean up the room. Is there something you want to talk to me about?"

Professor Xin seemed to be oblivious to the slight unfamiliarity and continued to ask, "Did they renovate your house? Why is it so warm?"

Yu Wei smiled harmlessly, "No, it's just that the bed is too hard. My boyfriend helped me make it again. It's getting late, so I'll go home first. You should go back and get some rest too." Then, ignoring the surprised looks from the people opposite, he opened the door and walked into the room. With a bang, he closed the door.

Xiao Yi's stove was now blazing red, and he was sweating slightly. He simply took off his coat and squatted on the ground, installing a thick, windproof curtain. Thick curtains are popular in northern China. They offer excellent protection against cold weather, allowing warm air to escape as people enter and exit the house. They also provide excellent privacy. Xiao Yi hammered four nails above Yu Wei's doorway and hung the windproof and warm curtain. Xiao Yi's aesthetic was a bit masculine, having chosen a pink curtain with a puppy on it for Yu Wei. Hmm, it was a bit rustic, but Xiao Yi thought it was adorable. After the curtain was hung, Xiao Yi wasn't idle either. He began to teach Yu Wei how to light the stove. After all, she would be doing all this herself from now on. How to add wood and coal, how to control the heat, how to boil water on the stove, and so on. As Yu Wei watched the dancing flames, she couldn't help but think of a movie about simple happiness. When all of people's material needs begin to rely on services purchased with money, they no longer realize how important it is to have enough food and clothing. Although Yu Wei was a little clumsy at first and even nearly hurt herself, Xiao Yi just stood by and gave her instructions without helping. Yu Wei also knew that if Xiao Yi was not around, she would have to learn these things on her own, so she worked hard to learn.

After installing the door curtain, Xiao Yi installed bed curtains on both sides of the kang so that he wouldn't feel cold when sleeping. When everything was installed, it was 5 o'clock in the evening. It was pitch black outside, but the room was warm and cozy.

Both of them were a little tired, and fell together on the scorching hot kang, feeling the slightly scorching temperature spread to their limbs and bones, and they couldn't help but hum comfortably.

Yu Wei hugged Xiao Yi's neck and rubbed it: "It's so comfortable. No wonder you left the electric blanket and batteries to grandpa."

Xiao Yi hugged Yu Wei's shoulders tightly: "This project of yours is a bit too big, and it's easy to alarm the neighbors. So let grandpa use the electric blanket first. The temperature in your room is too low, and the electric blanket probably won't be able to warm it up, so I'll just build you a kang, and you can cook and keep warm when you have nothing to do. It's all done."

"And don't be afraid. They won't dare to come here directly. When I'm not here, just stay in the institute. If you want to go home, ask Ye Ming to accompany you. Don't be alone. No matter what the situation, don't leave your watch with you. Remember? If anyone has any problems, send me a message and I'll come as soon as possible."

Looking at the nagging Xiao Yi, Yu Wei couldn't help but feel like she was back in her childhood. Her parents seemed to be just like that, always nagging and worrying about everything. "Okay, I know. Don't worry. I can take care of myself." Yu Wei was very well-behaved.

Xiao Yi looked at the pile of honeycomb coal and chopped firewood: "You can burn these things for a month, no problem. And the thing I just put on the wall is a carbon monoxide detector. Once the carbon monoxide concentration is too high, it will alarm. Remember, burn the stove before going to bed at night and don't let anyone into the house. You did a good job with neighbors like today."