One area of focus this year is China's move towards high-quality development, and the country's high-speed rail system is one example of that. The rail industry has seen rapid growth over the past decade and has become an important means of transport. And accordingly, ensuring safety -- not just innovation -- has become an enormous task. Our reporter Liu Xinqing shares the stories of maintenance workers and what it's like to safeguard these vehicles.

Getting ready to start work when most others have the day off. Ju Haishan is the head mechanic at the MU maintenance center of Zhengzhou Railway Bureau. For Mr. Ju, every high-speed train is like one of his children.

JU HAISHAN HEAD MECHANIC, ZHENGZHOU RAILWAY BUREAU CHINA RAILWAY CORPORATION "Ground service mechanics are often called 'train doctors', and take care of trains after one day of operation. We carry out daily body inspections to each train before they leave the next day to ensure railway transport safety."

Ju and his fellow workers have to maintain 48 pairs of trains every night at this center and each pair takes about two hours to finish. It might be mundane and repetitive work, but for the trains, daily inspection is extremely crucial. A minor error in the maintenance process could lead to major issues.

JU HAISHAN HEAD MECHANIC, ZHENGZHOU RAILWAY BUREAU CHINA RAILWAY CORPORATION "M.U. trains run at above 300 kilometers per hour, maintaining such trains is a big challenge for us both technically and psychologically because high speed means high risk. So we need to be extremely careful checking the train."

LIU XINQING ZHENGZHOU, HENAN "China has built a massive high-speed railway network covering 25,000 kilometers in 2017. It has made travel across China much easier and faster, and has created enormous opportunities for regional growth. But at the same time, it has also increased demand for the maintenance workers on the ground."

M.U. train maintenance centers like this one are springing up across China to meet the needs from an expanding high-speed rail network. This center had only 50 workers when it was set up ten years ago, but now the number is more than 1,800. The average age of the maintenance workers at this center is only 27. They are young, but well trained.

YANG YIFAN MECHANIC, ZHENGZHOU RAILWAY BUREAU CHINA RAILWAY CORPORATION "We have organized simulated training by creating real maintenance environments so they can grasp maintenance skills from training like practicing work in the field. We have drafted a training plan for 2018 to ensure full coverage in our professional training."

Live to learn. For these young mechanics, learning has become a daily routine. And the development of this maintenance center is a smaller version of China's high-speed rail expansion.

JU HAISHAN HEAD MECHANIC, ZHENGZHOU RAILWAY BUREAU CHINA RAILWAY CORPORATION "I think it's all worth it because passengers count on me for their safety. Over the past years, I can grow with the high-speed railway in China and contribute my own input. I feel it's a great honor".

Making itself known to the world with "China Speed", China's high-speed rail technology is linking up more and more cities within China and walks onto the world stage with the help of these mechanics. For Mr. Ju and his fellow workers, taking care of high-speed trains that millions of passengers rely on everyday is more than just a job, it's about sense of honor and pride. Liu Xinqing, CGTN, Zhengzhou, Henan Province.