999 Fun with the people. In fact, the length of 100 zhang is only more than 300 meters, even if you count the error of weights and measures in the Ming Dynasty and later generations, the height of 100 zhang will not exceed 400 meters.

Strictly speaking, at an altitude of 400 meters, the temperature will be a little colder and the air will be thinner than on the ground.

But at such a height, no matter how cold the temperature is, it can't get much colder, and the air can't get much thinner.

This height will not have much impact on the physiology of humans and animals.

It's just that the people of this era have never completely detached themselves from the ground to reach such a height, so they don't have a bottom line in their hearts about what the air looks like above this height.

This is not the same as mountaineering.

Although you can climb to the top of a mountain for 400 meters, or even 4,000 meters, you have your feet on the ground, which is definitely not the same experience as if you were completely off the ground and reached 400 meters in the air.

It is precisely because of this that all the people who know about the research task of the School of Engineering, including the head of the superior yamen of the School of Engineering, that is, Bi Maokang, the secretary of the Ministry of Engineering, are very cautious about sending people up for experiments.

It wasn't until Song Yingxing tied a 200-pound live pig to his limbs, put it into the hanging basket of the "Wanhu", rose to a height of 100 zhang in the air, stayed in the air for more than two hours, and then retracted the ground, the pig was still alive and intact, and these people who witnessed all this were really relieved.

When these people knew that there would be no fatal danger in taking the "Wanhu" hot air balloon into the air, the experiment of the manned flight of the hot air balloon of the Huangming Institute of Technology was quickly put on the agenda.

On February 16 of the fourth year of Chongzhen, between the Lu River and the Chaobai River outside Tongzhou City, after the wind and snow, the weather was fine, the haze was dissipated, the wind and the sun were beautiful, and the first fixed-point manned take-off experiment was carried out on the open hot air balloon flying experimental field of Huangming Institute of Technology.

This time, Song Yingxing, the director of the College of Engineering, who had completely figured out the reason, took his right-hand man Yang Zhihua, and the two of them totaled 300 catties, boarded the hanging basket of the "Wanhu", and lit a huge brazier like Jiuzun in the midst of attention and silence, and slowly rose into the air.

The final altitude of the lift was still 100 zhang, about 330 meters in later generations.

Perhaps the actual vertical altitude is less than 330 meters, because the hot air balloon drifts with the wind direction during liftoff.

As long as the anchor rope fixed to the ground is straightened, the hot air balloon can no longer float upward.

By the time Song Yingxing and Yang Zhihua got down alive from the "Wanhu" hot air balloon basket that had returned to the ground, no one had any doubts about the safety of flying in the air in a hot air balloon.

After Song Yingxing and Yang Zhihua had personal experience, they were also able to further summarize the process of controlling the hot air balloon to lift and off.

After a few days of training, a group of apprentices from the School of Engineering who voluntarily signed up for test flights, in the next half month, successively boarded the gondola basket of the "Wanhu" and carried out the lifting experiment of the hot air balloon fixed-point liftoff.

After all the preparations were done, Li Tianjing and Song Yingxing, the priest of the Institute of Engineering, were preparing to write to Emperor Chongzhen, inviting Emperor Chongzhen to visit the Huangming Institute of Technology in Tongzhou Dongshilibao to watch the manned take-off drill of the "Wanhu" hot air balloon, but he heard that Emperor Chongzhen went to Tianjin Dagukou Shipyard, and did not stop when he passed through Tongzhou.

Although he was a little disappointed, in the following period of time, Song Yingxing simply did not stop doing it, and directly carried out the release experiment in the early morning of March 10 when the safety of the fixed-point experiment had been repeatedly verified.

And the first experiment of low-altitude flight was a great success, the "Wanhu" hot air balloon carrying Song Yingxing and Yang Zhihua, from the experimental field of Tongzhou Dongshilibao Huangming Institute of Technology untied the anchor rope connected to the ground, drifted downwind at low altitude, before and after five hours, until the carrying of the fierce fire oil was exhausted, only in the northeast of Tongzhou Sanhe County in the mud puddle area of the wilderness landed.

In the middle of the night on March 10, the fourth year of Chongzhen, Emperor Chongzhen received an urgent report at the place where he stayed in the yamen of the Ministry of Engineering of Baiye City, which was the good news of the successful test flight of the Institute of Engineering.

The low-altitude experimental flight of the hot air balloon carried out by Song Yingxing and others was a great success for them, but for the local officials and ordinary people who saw the "Wanhu" hot air balloon flying at a low altitude between Dongshilipu in Tongzhou and Niwapu in Sanhe County, it was a shocking and inexplicable "encounter."

While Li Tianjing, Song Yingxing and others quickly reported the good news of the successful test flight to Emperor Chongzhen, the merchants and ordinary people from Tongzhou to Sanhe also quickly reported what they had seen to the local yamen.

The seemingly complicated news reported by these people was quickly reported to Emperor Chongzhen by the two major intelligence agencies of Jinyiwei and Dongchang.

Combined with the good news of Li Tianjing, Song Yingxing and others, Emperor Chongzhen thought about it for a while, and after confirming each other, he soon knew what was going on.

Let's say that Emperor Chongzhen's driving team, after starting from the south gate of Baiye City, successively stopped in Jizhou and Sanhe, and finally arrived at the East Shili Fort outside Tongzhou City at three o'clock on March 14, the fourth year of Chongzhen.

Along the way, Fang Zhenghua, the governor of Dongchang, and Sun Zhixin, the deputy commander of Yulinwei, who were the first to fight the front station every time, had already taken the officials of the College of Engineering, such as sacrificial wine, business, and courtyard, waiting on the avenue of Dongshilibao.

Dongshilipu was originally a tunpu that was moved to a guard post in Gyeonggi from outside the border, and now half of the tunpu military households here have moved to Rehe Tuntian to continue to be military households, and the other half has divided the original military land on the spot and entered the civil registration of Suncheonfu.

But now that Emperor Chongzhen is coming, ordinary people have long been told to stay in their own homes and can't go out and walk around.

The so-called monarch and the people are happy together, which is impossible to happen in this era.

Even in 300 years, 400 years from now, there will be no real joy with the people in this world.

And all the scenes that seem to be happy with the people in later generations are nothing more than performances deliberately created by monarchs or rulers.

Because all monarchs and rulers are on the other side of the relationship between the monarch and his subjects, the ruler and the ruled.

The wise, the stupid, the hereditary, the elected, the legal, the illegal, the fundamental goals pursued by all monarchs, and those pursued by ordinary people, can never be fully compatible.

The bigger the country, the more so.

It is already a rare situation for the monarch of a large country to be able to maintain parallel or the same direction as the goal pursued by the majority for a limited period of time.

This is like the current Emperor Chongzhen, who came to this era by chance and took control of the empire, what he wants to do is, of course, to promote the revival of the Ming Dynasty and pursue the rise of the Ming Empire.

To do this, he had to make many ruthless decisions, such as war after war, forced migration after forced migration, and the unscrupulous seizure and accumulation of wealth.

Although Emperor Chongzhen in the original history did not do a good job, his general direction was also this way.

It's just that compared to the current one, he was forced to do it, and now this one is doing it on his own initiative, and at the same time he is doing it spontaneously, and now this one is doing it consciously.

But regardless of whether their approach is spontaneous or conscious, forced or active, their basic goal is the same.

In history, Emperor Chongzhen also pursued the revival of the Ming Dynasty and the rise of the Ming Empire.

However, those ordinary people who are struggling to survive in the midst of hunger and cold every day, will they care about the rise and fall of this Ming Dynasty?

Of course not, and it can't.

Perhaps they are all looking forward to Emperor Chongzhen's death, the early demise of the Ming Dynasty, and the emergence of a new dynasty, so that they can be fed and clothed, and live the kind of life of "eating his mother and wearing his mother to break the king and not paying food".

Of course, the monarch must serve the country and the people, which is the duty of all monarchs in the world, and it is his responsibility and obligation.

But the way of service can vary widely, and it is likely to be not understood by ordinary people.

Emperor Chongzhen hanged himself to death in history and hanged himself on Banzai Mountain, isn't it a living lesson?

Therefore, since coming to this era, the current Emperor Chongzhen has never regarded the importance of being happy with the people or the support of the people.

Because he knows very well that the crowd cheering in front of you today may trample you to death in the blink of an eye.

So he never engaged in any micro-service private visits and fun with the people.

On the afternoon of March 14 in the fourth year of Chongzhen, it was a sunny and sunny day, and Emperor Chongzhen, surrounded by a group of ministers and attendants, followed Li Tianjing and Song Yingxing to the empty field experiment field behind the College of Engineering.

Emperor Chongzhen saw the tall "Wanhu" hot air balloon parked on the experimental site from a long distance, and while striding forward along the blue brick paved road, he said to Song Yingxing, the director of the engineering college who bowed down in front of him on the right:

"Not bad! You have a good grasp of the shape and size of this hot air balloon! This name is also good, and it will be called Wanhu in the future!

"And in the future, every hot air balloon produced must be given a good name, and all hot air balloons made according to this shape and size can be collectively called the 10,000-level level!

"A hot air balloon that is bigger than it, or smaller than it, can have different uses, such as a harbor or a sea ship used for lookouts, throwing grenades and fire bombs in front of the two armies to kill the enemy, and even flying over the enemy's city walls and landing directly into the enemy's city to launch a surprise attack, all of this, the Military Aircraft Department, the Ministry of War and the Ministry of Engineering, as well as the Armament Institute and the Institute of Engineering, must ponder this matter carefully!"