Who understands? He traveled through time with a high-spec spatial ability.

Uncle Yuan took the blueprints, examined them carefully, and a smile appeared at the corner of his eye: "I can understand these blueprints, but it will take some effort to make them."

"And here, so that's what you meant by leaving an opening in the wall." Master Yuan pointed to the fire pit on the diagram, where the stove and the kang (heated brick bed) were connected. Originally, Qiao Jingjing didn't know the specific structure of the kang, only that an opening needed to be left in the wall beforehand to allow smoke and heat from the stove to pass through.

So when she first started building the house, she asked the foreman to leave a useful opening. After consulting encyclopedias and videos, she finally decided to build a cylindrical kang (heated brick bed) that could connect two rooms, separated by a wall. The stove and the kang would be at a 90-degree angle, so that the kang on both sides would be heated more evenly.

Since cement is unavailable now, blue bricks, yellow mud, and wooden planks can be used as substitutes. The height of the kang wall is generally 50-60 centimeters, and the width is 60-80 centimeters.

Lay kang boards on the kang wall, leaving gaps between the boards to allow for heat circulation. Then fill the kang boards with loess, ensuring the loess is evenly distributed and about 20-30 centimeters thick. Use a trowel to smooth the loess surface, making it flat and smooth.

A chimney is built at one end of the kang (a heated brick bed), typically 3-5 meters high and 20-30 centimeters in diameter.

Finally, light the fuel in the stove hole and observe the fire and the temperature of the kang surface to ensure even heating. Adjust the amount of fuel and ventilation according to the fire and surface temperature to maintain a suitable temperature. Additionally, insulation boards are needed to allow smoke and heat to escape through the chimney when it's not cold. Otherwise, how can one sleep in the summer?

This kang (heated brick bed) is for my parents and younger brother. Building a kang in Qiao Jingjing's room is simpler; there's no need for a separate stove, just a kang, a flue, and a chimney. A small door is placed near the ground, and some fuel is burned inside to heat the kang.

Qiao Jingjing only had theoretical knowledge; even after watching the videos, she still only had a vague understanding. She could only try to explain in detail and let Master Yuan think about it first.

Master Yuan was quite amazed when he looked at the blueprints. How were those thin, straight lines drawn? Many details were clearly marked. After all, he was a veteran craftsman with many years of experience. Although he had never done it before, the principles were all similar, and he could tell the feasibility based on his experience.

Qiao Jingjing was overjoyed: "Really? Then I'll have to trouble Uncle Yuan! If it's done well, we won't be cold this winter!"

Uncle Yuan nodded and agreed. He found several strong young men, and together they began to build the heated kang (a traditional Chinese bed-stove) according to the blueprints.

In just one day, the kang (heated brick bed) was successfully completed! This speed surprised and delighted Qiao Jingjing. She couldn't wait to light the fire, eager to experience the warmth of the kang. As the fire grew stronger, waves of heat gradually emanated from the kang, making her feel incredibly comfortable. Qiao Jingjing ran her hand along the edges and center of the kang, feeling the warmth, her heart filled with joy.

After some observation, she found that the heated area of ​​the kang (heated brick bed) was quite good and could meet her daily needs. However, since the kang was newly built, it was still a bit damp inside and needed to be aired out until it was completely dry before she could use it with confidence. It just so happened that the new house also needed to be aired out.

Having learned how to build a kang (heated brick bed), Qiao Jingjing finished hers much faster, in half a day. She added some firewood to the kang's firebox to evaporate the moisture and make it dry quickly.

Soon the day of raising the roof beam arrived.

The roof beams were made of beech wood, a hard and beautiful-grained wood with high strength and stability. The villagers also valued its good resistance to corrosion, allowing it to be used in humid environments.

Foreman Yuan set up an altar in the courtyard, on which were placed simple pastries, fruit, and three cups of wine. Qiao Wanjun lit firecrackers, and Foreman Yuan poured the wine onto the ground in front of the altar. Then, ten men, five on each side, carried in a roof beam, with a copper coin hanging from the front of the beam on a red rope. Shouting slogans, everyone worked together to lift the beam and place it onto the main structure, then nailed it in place. Qiao Jingjing scattered some roasted peanuts and chestnuts, which children scrambled to grab, adding to the festive atmosphere.

The lively crowd began to tour the new house. They had never seen this style before. Qiao Jingjing hadn't designed the house to be particularly beautiful; it was just a simple courtyard house. Its only impressive feature was that it was entirely made of blue bricks, making it sturdier and taller than adobe houses.

The yard wasn't small, but because there were neighbors on both sides, it was rectangular, extending towards the back of the house, enclosing the vegetable garden, chicken coop, stable, pigsty, and toilet within the walls. The walls were reinforced with blue bricks to a height of 2 meters, and many sharpened bamboo spikes were stuck in them. Except for the vegetable garden, the ground was entirely paved with blue bricks; Qiao Jingjing had had enough of the muddy and dusty days, and she planned to renovate it again once cement was laid. A well was also dug, so she wouldn't have to queue at the village's collectively funded well anymore.

The villagers toured the place with envy, especially the heated kang (traditional Chinese bed). The mountains get cold early and are damp, making winters unbearable for those with chronic leg pain or women who have given birth. The thought of the heat from cooking and heating reaching the bed warmed their hearts. They asked Foreman Yuan if they could have one installed and how much it would cost.

The blueprints were Qiao Jingjing's; Master Yuan didn't make any decisions on his own, and only nodded after obtaining Qiao Jingjing's consent. The price will be determined based on the layout and size of each house.

Grandma, Lin Shi, and their siblings are preparing a feast. They're not inviting the whole village, but they are hosting a banquet for those who did the work, as well as the village head and clan elders.

Several people assisted, while Qiao Jingjing took charge of cooking. Fortunately, the weather wasn't hot, and some dishes had been prepared in advance. Xuan Yi arrived, drawn by the aroma, feeling a little embarrassed. Having missed the ceremony, it was as if he had deliberately timed his arrival for the meal. He was dressed in coarse cloth today, and apart from being a bit tall, he didn't stand out in the crowd; no one noticed the extra stranger.

Qiao Jingjing came out to find an empty plate. When she saw him, she gestured for him to wait a moment.

Lin Xiuli, carrying a basket of steamed buns, came out of the kitchen without noticing Xuan Yi's sudden appearance. "Ouch!" She was already rushing forward with all her might, and the inertia made her stop but she was still moving forward, her forehead bumping into Xuan Yi's chest.

She couldn't put her hands down comfortably, so she instinctively tilted her head to try and soothe him with her arms. When she looked up and saw that it was a strange man, she immediately felt embarrassed and ran away without thinking.

Seeing this, Xuan Yi was somewhat at a loss. He wanted to apologize, but then he saw Qiao Jingjing walking over and quickly said, "Miss Qiao, I'm so sorry, I startled that girl just now." Qiao Jingjing smiled and shook her head, indicating that she didn't mind, "You didn't mean it, she won't blame you."

She took out two bundles she had prepared beforehand. One contained medicinal powder and some pills. The other contained several portions of medicinal food ingredients, all ready to be used for making soup. She also packed a few of her signature dishes and some steamed buns for him to take back and try. After thinking for a moment, she took out a compass and handed it to him. Compasses are 3 years old; she didn't know if they still existed in this era, but even if they didn't, it didn't matter. She gave him a regular compass, which wasn't unusual.

It's unreasonable to give only some medicine powder after giving so much silver.