![](http://www.ecns.cn/hd/2023/03/22/8fd4b235eaf24742b57b6348a2a9affd.jpg)
A suburban train runs through blooming flowers interspersed along the S2 line near Juyongguan Pass of the Great Wall in Beijing, March 21, 2023. (Photo: China News Service/Yi Haifei)
![](http://www.ecns.cn/hd/2023/03/22/aaf0ae273d2d4244967610dd4f117b68.jpg)
A suburban train runs through blooming flowers interspersed along the S2 line near Juyongguan Pass of the Great Wall in Beijing, March 21, 2023. (Photo: China News Service/Yi Haifei)
![](http://www.ecns.cn/hd/2023/03/22/2e4998bed85f41998fdc19fb25a4d457.jpg)
A suburban train runs through blooming flowers interspersed along the S2 line near Juyongguan Pass of the Great Wall in Beijing, March 21, 2023. (Photo: China News Service/Yi Haifei)
![](http://www.ecns.cn/hd/2023/03/22/b18793d7f3704e748dce2a1c3d56bc99.jpg)
A suburban train runs through blooming flowers interspersed along the S2 line near Juyongguan Pass of the Great Wall in Beijing, March 21, 2023. (Photo: China News Service/Yi Haifei)