02:44

How difficult is it for ordinary people to climb Mount Everest? Starting with 100000 tickets revea

03:01

Do you know where the only airport with five runways in our country is? What is the scale?

03:01

Do you know where the only airport with five runways in our country is? What is the scale?

03:03

How important is the Jinghan Canal in Hubei? Once completed how much influence will it have on Hun

03:03

How important is the Jinghan Canal in Hubei? Once completed how much influence will it have on Hun

02:50

Why did the bridge pillars fall? Is it a natural disaster or a man-made disaster? Explain the colla

02:47

How wide is the plane's route? Is it a two-way passage or a one-way passage? Reveal the rules of tr

02:47

How wide is the plane's route? Is it a two-way passage or a one-way passage? Reveal the rules of tr

02:49

With an area of over 450 square kilometers why is there no native fish in Sailimu Lake in Xinjiang

02:49

With an area of over 450 square kilometers why is there no native fish in Sailimu Lake in Xinjiang

02:48

Where is the cheap airline? Is it safe? Finally solved my doubts for many years.

02:48

Where is the cheap airline? Is it safe? Finally solved my doubts for many years.

02:45

What is it like to take off and land at the world's most dangerous airport? The captain's first per

02:44

What is it like to take off and land at the world's most dangerous airport? The captain's first per

02:51

How did the ”Longan Tide” of the Qiantang River come into being? Exploring the Wonders of Tidal Pow

02:51

How did the ”Longan Tide” of the Qiantang River come into being? Exploring the Wonders of Tidal Pow

02:48

What is a ”fractal vise”? Why is a genius design 100 years ago not popular today?

02:48

What is a ”fractal vise”? Why is a genius design 100 years ago not popular today?

02:45

Mobile phone map navigation how do you know the traffic lights count seconds? How do you know abou

02:34

Why is it forbidden to take photos at Lhasa Railway Station? It is clearly a railway station why i

02:53

What is it like to fly for 17 hours? The whole journey is 15000 kilometers revealing the longest r

02:42

Why air tickets are often discounted while high-speed rail tickets would rather be empty than disc

02:59

How is the world's longest high-speed railway ”Baohai High-speed Railway” built with 420 billion

02:40

Why does the plane climb step by step? Can't you fly directly to cruise altitude? Knowledge has inc

02:46

How does a 100-ton plane absorb shock when landing? After sitting for so long I finally know

02:35

Why does the train whistle frequently don't you worry about disturbing the people? The original ef

02:56

Why should the Qinghai-Tibet Railway be replaced when it is running? Can't domestic car heads be us

02:39

Will the wing be broken when the plane encounters turbulence at an altitude of 10 000 meters? Fear

02:53

What is the difference between high-speed rail and high-speed train? What is the difference between

02:40

Why has the once popular roundabout been replaced now? How can I get around the island?

02:36

Why aren't the highways equipped with street lights? Airports and ring highways however have been

02:40

Why did the high-speed railway from Huangshan to Nanjing detour to Hangzhou first? Is it unnecessar

02:47

If the plane opens the reverse thrust in the air what will be the consequences? Real cases tell yo

02:46

Which position is the safest on the plane? Buying a plane for on-site testing is a great cost!

02:45

Incredible waves can generate electricity in the sea. What is the principle?

02:33

Why is there no seat belt on the 350-speed high-speed train? The original mystery is in the seat

02:54

What happens when a large plane lands in a small airport? Real cases tell you the answer.

02:47

Why is the round trip time different on the same route? Is the plane flying around?

02:54

Also in Shandong why is Shandong Airlines repeatedly praised hard core Shandong high-speed rail i

02:49

A small camera a year fine income 25 million! How severe is Shenhai Expressway

02:41

Where does the electricity on the plane come from? What if there is a sudden power failure? I 've l

02:45

What does ”double bow forbidden” beside the railway mean? What is the purpose? I finally know for s

02:46

How terrible is the ”flying steel accident”? How did it happen when thousands of degrees of high-te

02:34

China's high-speed charges have been losing money year after year while the United States has made

02:43

U.S. airports exceed 20 000! Our country is less than 1 000. Why are there so few airports in our c

02:44

Why do you have to board the plane from the left? Why doesn't the right hatch open? I finally know

02:50

The plane is so fast how did it stop quickly when landing? Look at the fuselage change process

02:56

A stay is a few months! How do submarines supply oxygen underwater? Engineers have their own tricks

02:41

Is it difficult for the plane to take off or land? The real case gives you a conclusion which is d

02:44

沉没73年才被发现，泰坦尼克号为何至今无人敢打捞？终于知道了

02:50

How powerful is Tokyo Airport? Airplanes have to take a detour to take off and land and they are t

02:57

What's the use of rubbing the spinning ”wheels” in the cockpit? Aircraft trim is necessary!

02:46

Incredible ”animal rain” tens of thousands of fish fell from the sky! Where do they come from?

02:50

SF has its own airport! Asia's only cargo airport why choose in Hubei Ezhou?

02:51

2 years moving 55 meters! Have you ever seen a mud spring that can ”run”? It forced the railway to

03:01

What if the concrete tanker is ”stuffy”? At least tens of thousands of losses! I 've seen it for a

02:52

Per capita height is not more than 2 meters why high-speed railway station to build dozens of mete

02:52

Constant speed cruise failure accidents occur frequently! What is the special reason behind it? No

02:47

The runway is clearly empty why wait a few minutes before the plane takes off? Can't we wait?

03:01

How abnormal is the pelican transport plane a super aircraft twice the size of 225 Ann?