What does it mean to "bring happiness to the snowy plateau" in Heavenly Road?

First of all, this song is to commemorate the opening of the Qinghai-Tibet Railway. "Tianlu" is the Qinghai-Tibet Railway. Due to the extremely high altitude and permafrost in the Qinghai-Tibet Plateau, the transportation between the Qinghai-Tibet Plateau and the outside world has always relied on roads and civil aviation. In order to speed up Tibet's economic development and people's living conditions (more political factors), the country has built the world-famous Tibet Railway ... which really benefited the snowy plateau. Therefore, there is "Send to Snow Plateau" in the lyrics.

But one problem we can't ignore is: environmental protection!

I never play copy and paste when answering questions.

If you are not clear, you can search Baidu! I wish you a happy life ~