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On Dec 3, 2021,the newly-built 1,035-km cross-border railway linking China's Kunming, capital of Yunnan Province with the Laotian capital of Vientiane, was offically put into operation after 6 years hard construction across the mountins and rivers. How hard you may imagine, Laos whole country only run 3.5 km long railway before this new railway's operation.
