The fawn was also released and ran around happily in the forest.
However, Xu Ning would call it back every once in a while. The forest was freezing cold, and the deer used to live in the warm hot spring forest. She was worried that it would get cold.
Xu Ning and Jiang Yan spent three days working with robots to clear and level the area where the ironworks would be built.
During the rest period at night, Xu Ning and Jiang Yan drew a model of the ironworks in the RV.
The southwest wind came soon. Xu Ning put the deer back into the space and took out the exchanged hot air balloon. This time she did not put away the robot, but let it follow the direction of the hot air balloon to open a passable path.
Jiang Yan was very nervous when she boarded a hot air balloon for the first time. Xu Ning kindly gave her his hand. As the hot air balloon took off, Jiang Yan's worldview was once again broken.
The hot air balloon was flying very fast with the wind at its back. Xu Ning could clearly see through the gaps in the wire mesh that the robot below had been thrown a long distance.
The two of them looked intently at the scenery below. The tall trees looked like grass from the air.
"Aning, this is amazing." Jiang Yan turned his gaze to the hot air balloon and admired the person who designed it.
Xu Ning had nothing to do, so he talked to Jiang Yan about the principle of hot air balloons.
"A hot air balloon is actually an aircraft that relies on the buoyancy of hot air to fly. You see, that super-large air bag on top is filled with hot air, and we rely on this air to carry the entire hot air balloon into the sky.
The principle is that when an object is immersed in a liquid or gas, the buoyant force it experiences is equal to the weight of the liquid or gas it displaces. In a hot air balloon, the hot air inside the balloon is lighter than the surrounding cool air, so it floats upward. This is the effect of buoyancy. When the buoyancy is greater than the weight of the balloon itself, the balloon soars.
How high and how fast a hot air balloon can fly depends on the temperature of the hot air and the size of the balloon. Generally speaking, the higher the hot air temperature and the larger the balloon, the higher and faster the balloon can fly. Of course, a hot air balloon's flight is also affected by weather conditions, such as wind speed, direction, and air pressure.
Jiang Yan listened very carefully. In order to help him absorb the knowledge more clearly, Xu Ning took out a tablet to show him.
The hot air balloon the two of them were riding in was very large. Seeing that he was watching it intently, Xu Ning started to circle around the balloon by himself.
By the time Jiang Yan finished watching the video, Xu Ning was already observing everywhere with a telescope.
Ever since it went up to space, Xu Ning pulled out the treasure chest and used it as a monitoring device. Xu Ning's purpose of observation was not to prevent anyone from seeing the hot air balloon, but to observe whether there were any treasures in the deep mountains and forests.
The wind was so strong that Xu Ning didn't even notice Jiang Yan coming over. He was looking intently at a withered tree.
After confirming that the big tree stump was growing Ganoderma lucidum, she immediately remotely controlled the robot to pick them as it passed by.
As soon as Xu Ning finished giving the order, she looked down and found that the hot air balloon had already gone far away from the big tree. The trees in the forest blocked her view and she could no longer see where the big tree was.
Xu Ning didn't feel sorry, so she adjusted the telescope and continued looking for treasures. Suddenly, a pair of warm hands covered her frozen ears.
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