China's C919: 1400 Orders, Only 7 Deliveries in 8 Months, Why?
China's C919: 1400 Orders, Only 7 Deliveries in 8 Months, Why?In today's globalized era, technological prowess serves as a crucial indicator of a nation's comprehensive strength. China, once a "follower" in the realm of technology, is now undergoing a remarkable transformation, rapidly shifting from "following" to "running alongside" and even "leading" the pack...
Why Are River Boats Prohibited From Entering the Sea? Unlocking the Millennial Riddle of "River and Sea Inseparability"
Why Are River Boats Prohibited From Entering the Sea? Unlocking the Millennial Riddle of "River and Sea Inseparability"While both river boats and ocean-going vessels share the ability to carry passengers and cargo, why are river boats forbidden from entering the sea? This seemingly simple question hides deep considerations of maritime safety and economic efficiency.River boats, as the name suggests, are vessels designed specifically for river navigation...
Six Provinces Join Hands, 850 Billion Yuan in Investment! Why is China Digging an Inland "Century Canal"?
Six Provinces Join Hands, 850 Billion Yuan in Investment! Why is China Digging an Inland "Century Canal"?As we all know, waterway shipping is the most economical mode of transportation. A well-developed waterway system can generate substantial economic revenue and drive the overall development of an entire region...
Why does China use iron instead of stainless steel for its railway tracks?
Why does China use iron instead of stainless steel for its railway tracks?China's railway construction, from the birth of the Shanghai Public Tramway in 1861 to the nationwide railway network today, has spanned over a century, witnessing technological advancements and the changing times. Throughout this long development process, the materials used for railway tracks have evolved from cast iron to steel and then to high manganese steel...
Why Did China's Space Station Choose Japan Over South Korea? A Complex Calculation
Why Did China's Space Station Choose Japan Over South Korea? A Complex Calculation...
Why Do Planes Avoid Flying Over Tibet?
Why Do Planes Avoid Flying Over Tibet?Tibet boasts eight civilian airports, but why do most planes choose to take longer, fuel-consuming routes instead of flying directly over the region? Do airplanes experience "altitude sickness" too?The Tibetan Plateau, a vast expanse averaging over 4,000 meters in elevation, appears as a "vacuum zone" on airline route maps. One might wonder if it's simply the high altitude that prevents planes from flying over it...
Why Do We Always Board Planes from the Left? Historical and Safety Considerations
Why Do We Always Board Planes from the Left? Historical and Safety ConsiderationsHave you ever noticed that, regardless of the aircraft you board, we always enter through the left side door? This isn't a coincidence; it's rooted in a rich history and thoughtful safety considerations.A Habit Stemming from the Age of SailingThe tradition of boarding planes from the left can be traced back to ancient seafaring...
Why Do Female Astronauts Take Birth Control? Unveiling the Secret Challenges of Space
Why Do Female Astronauts Take Birth Control? Unveiling the Secret Challenges of SpaceIn 1961, Soviet cosmonaut Yuri Gagarin became the first human in space, ushering in a new era. Today, countless astronauts have ventured into space, but what remains largely unknown is that the number of female astronauts is remarkably small, and almost all of them are required to take birth control pills before missions...
Tesla "Returns" Tom Zhu, Why Does Musk Value the Chinese Market So Much?
Tesla "Returns" Tom Zhu, Why Does Musk Value the Chinese Market So Much?Elon Musk, CEO of Tesla, has once again made a surprising move by "returning" his trusted lieutenant, Tom Zhu, to China, sparking widespread attention. What makes Zhu, who Musk calls the "king of rolling up his sleeves," so extraordinary? Why does he receive such high regard from Musk? Can he once again save Tesla's Chinese market upon his return? Let's delve into the story behind this "firefighting hero" of Tesla...
Why Do Female Astronauts Take Birth Control Pills Before Going to Space? Can Space Menstruation Really Be Life-Threatening?
Why Do Female Astronauts Take Birth Control Pills Before Going to Space? Can Space Menstruation Really Be Life-Threatening?From ancient times to the present, humanity has harbored a deep fascination with "ascending to heaven," with countless stories about gods and deities passed down through generations. This demonstrates our profound curiosity about life and places beyond Earth...
Inland Provinces in China Invest Heavily in Canal Construction: Why are Inland Provinces Still Fond of Water Transport in the Era of High-Speed Rail?
Inland Provinces in China Invest Heavily in Canal Construction: Why are Inland Provinces Still Fond of Water Transport in the Era of High-Speed Rail?It is well known that waterway shipping is the most economical mode of transportation. A developed waterway system can generate substantial economic revenue and drive regional overall development...
Why Does the Qinghai-Tibet Railway Still Use American Locomotives? When Will Domestic Locomotives Be "On Duty"?
Why Does the Qinghai-Tibet Railway Still Use American Locomotives? When Will Domestic Locomotives Be "On Duty"?The Qinghai-Tibet Railway, spanning the Qinghai-Tibet Plateau and known as the "Roof of the World", has been in operation for 18 years since its opening in 2006. This railway, considered a marvel of Chinese engineering, connects Xining and Lhasa, bringing once-inaccessible Tibet closer to mainland China...