Reporters take photos during an event marking the two-year anniversary of the opening of the Beijing-Zhangjiakou high-speed railway at the Beijing North Railway Station in Beijing, capital of China, Dec. 30, 2021. The high-speed railway connecting Beijing and Zhangjiakou in north China's Hebei Province went into service on Dec. 30, 2019. (Photo by Fang Xin/Xinhua)
