The high-speed rail network is all over China, and technology leads the world
Since the development of high-speed rail in mainland China, a huge high-speed rail operation network has been formed, and its wide coverage and large scale of operation have impressed the world. In 2022 alone, the newly opened mileage of high-speed rail will exceed 3,000 kilometers and come to 3. A staggering figure of 50,000 km.
This indicates that China's high-speed rail network has penetrated into various places, connecting the north and south of the country.
Behind such a vast network coverage is the great achievements of China's high-speed rail in core technological innovation. The high-speed train with a speed of more than 350 kilometers per hour traverses the vast Central Plains, and its speed has made many foreign experts smack.
Xiao Li is a technician of Guangzhou-Shenzhen Railway Company, and he said proudly: "This speed is fast, relying on the composite materials independently developed by our CRRC, which greatly reduces the weight of the body."
It can be said that China's high-speed rail has reached or approached the world's first in many dimensions such as operating mileage and operating speed, which comes from the great progress made by Chinese enterprises and researchers in core technological innovation.
China's high-speed rail has become a banner of Made in China and Innovation in China in the new era. It is this banner that makes the world full of confidence in the rejuvenation of the Chinese nation.
The Qinghai-Tibet Line Runs Through Tibet The Chinese people have overcome hardships and dangers
The construction of the Qinghai-Tibet Railway, which is considered "impossible" by many foreign experts, is astounding. It was a vast plateau, 4,000 meters above sea level, with thin oxygen and oppressive cold.
It is extremely difficult to construct in such an environment.
In 1958, the first phase of the Qinghai-Tibet Railway project started. However, due to the unique topography, the construction progress was very slow. "Some of the slopes are steep and we can't dig much in a month.
Li Zhiwei, a veteran engineer, said. Even more troubling is the repeated rainy season on the plateau, where mudslides and landslides continue to threaten the line project.
However, the Chinese people were not knocked down by difficulties, and after years of hard work, the first phase of the project was finally completed and opened to traffic in 1984. In 2001, the second phase of the project was completed in its entirety, further shortening the distance between the two projects, and the masses in Tibet cheered loudly.
By 2006, the project, which had taken nearly 50 years, was completed, and exchanges between Tibet and the mainland have been unimpeded ever since.
Under conditions that seem unimaginable to outsiders, the Chinese people have completed this project of the century with unswerving perseverance. As one expert put it: "The completion of this railway is a spiritual symbol of the Chinese nation's perseverance and self-improvement."
Analysis of the necessity of imported locomotives
Operating a railway in such a complex plateau environment places extremely high demands on the locomotive's adaptability. The high altitude and thin oxygen of the Qinghai-Tibet Plateau seriously affect the locomotive power and combustion efficiency.
In addition, large areas of permafrost along the 550 km can be deformed, requiring locomotives to provide sufficient traction.
"It can be minus 30 degrees Celsius in winter and 10 degrees Celsius in summer. Such extreme temperature differences have a great impact on machinery. Master Yang, a retired veteran technician of the Ministry of Railways, said.
He also mentioned the rainy nature of the plateau, and the locomotive had to adapt to the normal operation of the rainy season for nearly three months.
Faced with such a grim situation, China at that time did not have the ability to develop a special locomotive that was fully adapted to the environment. Although experts have designed two kinds of plateau locomotives and carried out prototype trial production, there are still some problems, and there is a gap with foreign locomotives.
In order to ensure the safety of the railway and protect the lives and property of passengers, experts believed that it was necessary to introduce foreign locomotives with more advanced technology at that time. "It's also an opportunity for us to learn and Xi.
Professor Li, an expert who has developed a plateau locomotive, said. He firmly believes that China will one day be able to design locomotives completely independent for the plateau.
It can be said that considering the domestic technical level at that time, importing locomotives was a very necessary and rational choice. This has escorted the operation of the Qinghai-Tibet Railway and allowed China to accumulate valuable experience.
Do not give up on the road of independent innovation
China's choice to import locomotives did not mean that it would give up independent innovation, but that it was based on practical considerations at the time. As one expert said, "Science has no borders, but science and technology have a nation".
This sentence shows the importance of independent innovation to the development of a nation.
On this road, the Chinese people have made great efforts. The "Dongfeng 8B" and "Dongfeng 11" locomotives, which were developed to adapt to the plateau, are examples. They exposed some problems in the initial test operation, and the Chinese experts were not discouraged, but through unremitting efforts to improve and improve, and finally made the two domestic locomotives basically able to work normally on the Qinghai-Tibet line.
At first, in the 90s of the 20th century, China launched the arduous project of building the Qinghai-Tibet Railway. However, the special environment of the plateau posed a great challenge to the locomotive, and China at that time did not have the ability to develop special locomotives that adapted to the environment.
Therefore, Chinese locomotive experts have made efforts to design two plateau locomotive schemes, "Dongfeng 8B" and "Dongfeng 11", and made prototypes for trial operation, which can basically adapt to the Qinghai-Tibet line transportation.
But there are still some problems in the tests, and there is still a gap between these two domestic locomotives and imported locomotives in some aspects. In consideration of protecting people's lives, China finally chose to rationally import locomotives from abroad.
This does not mean giving up independent innovation, but it is a reasonable choice at that time. As one expert put it, "Science knows no borders, but science and technology have nations". On this path of truth-seeking and pragmatic innovation, China is constantly accumulating capabilities.
Today, China is fully capable of designing all types of railway locomotives on its own. The completion of the Qinghai-Tibet Railway is a testament to this. To this day, China's high-speed rail is known for its 3. With 50,000 kilometers of operating mileage, advanced speed and technology, China also has the world's largest railway network, becoming the world's leader in high-speed rail technology.
China has a firm will for independent innovation and continuous enhancement of innovation strength. It can be said that this story is a portrayal of the continuous growth of the Chinese nation on the road of independent innovation.
The choice to introduce was not a mistake, but a rational approach at the time; But we attach more importance to independent innovation, which is the most fundamental internal driving force of the Chinese dream.
The epilogue echoes the theme idea
Through the above combing, we can conclude that China's choice to import locomotives from abroad was a rational practice at that time, which played an important role in ensuring the operation of the Qinghai-Tibet Railway.
At the same time, this choice does not mean that China has given up on independent innovation. From the development of "Dongfeng 8B" and "Dongfeng 11" locomotives, it can be seen that China has made great efforts on this road.
Now China has the ability to design all kinds of railway locomotives, which fully proves that China has not given up independent innovation.
In fact, the import of locomotives has given Chinese locomotive experts a valuable opportunity to learn Xi advanced technology and improve themselves. As Professor Zhang, Dean of the School of Mechanical Engineering of Tsinghua University, said: "The predecessors planted trees, and the descendants enjoyed the shade."
Today, China's high-speed rail technology can be at the forefront of the world, and the tree planted by predecessors is indispensable.
Looking forward to the future, on the road of independent innovation, China still needs to learn a lot from the world's outstanding achievements and integrate innovation. At the same time, we must also strengthen confidence, forge ahead, and strive for first-class results.
Wang Hai, a Chinese science and technology worker, posted a note on his desk that reads "Reading for the Rise of China", which represents the common aspiration of countless Chinese science and technology workers.
It can be said that this spirit of unremitting self-improvement and daring to be the first will continue to promote the great rejuvenation of the Chinese nation.