All aboard! Let's take a ride on the world's highest railway—the Qinghai-Tibet Railway（青藏铁路）. Sit back and enjoy the journey. Get ready for the trip of a lifetime.

We're leaving Qinghai Station. The scenery along the way is some of the wildest in all of China. Keep your eyes open as we race through this beautiful land. You might see a rare Tibetan antelope（藏羚羊）from your window.

Before we begin our journey. let's learn about this amazing railway. It's truly one of the great engineering wonders of the 21st century. When it was 'completed on July 1,2006, the Tibet Railway set nine world records. including the world's highest railway at 5,072 metres above sea level, the world's highest tunnel（隧道）at 4,905 metres, and the longest tunnel ever built on permafrost（冻土）.

As we travel higher, the air gets thinner and thinner. Soon there will only be 50 to 60 percent of the oxygen which we are used to breathing. But don't be afraid. Each rail car has two separate oxygen systems. One system spreads oxygen throughout the train at all times. And each passenger can also get a personal oxygen mask just like those used in planes.

Here are a few more things to think about as our train leaves the station. The designers solved three main challenges when building this great railway. First, the high altitude（海拔）made the task difficult because there was no enough oxygen. Second, much of the railway runs across permafrost, a type of ground that keeps changing as the weather warms and cools. Finally, the railway goes through some of the most sensitive ecology（敏感的生态环境）in China. Great care was necessary to make sure of the smallest possible influence on nature.

All three challenges were met, making our trip possible. All aboard! The train to Tibet is leaving in fifteen minutes.

Mingming is a student, who is 1.4 meters tall. This summer, he and his mother are going to travel by high-speed train. Here is some information they have got.

Attention:

1）Children below 1.2 meters: free;

2）Children between 1.2-1.5 meters: half price.

In September, 2020, I had the chance to come to China for the first time and visited Yunnan Province.

On the first day, we went to a village named Xiaopingzhai. I was amazed to discover tat small tea factory could bring in 6 million yuan a year with only 20 workers.

The next stop of our trip was the village of Kangmian. Many families now live there after lea.ving uninhabitable (不适合居住的) areas. The new village has 450 housing units. There I have learned that the government helps the people by providing jobs so that they can support themselves. Of the 1,331 villagers, 609 now have jobs.

In Shuiduichong, a traditional Yao ethnic(瑶族) group village, we visited the workshops for making silver ornaments (饰品) . We discovered the skill had a history of more than 200 years. Besides the traditional use of silver ornaments in Yao culture,      ▲     .

 A set of silver ornaments can be sold for between 10,000 and 20,000 yuan on the market. The making of silver ornaments creates jobs in the village. Shuduichong now has more than 20 family workshops.

This trip was over. I have realized that trough the hard work of the Chinese government, great changes have taken place in Yunnan. These impressive (印象深刻的) results should serve as an example for other developing countries.