The Beijing-Zhengzhou high-speed railway will start service on Dec. 26, connecting the functioning Zhengzhou-Wuhan and Wuhan-Guangzhou high-speed railway to become the world's longest high-speed railway. It will take only seven hours and 59 minutes to travel from Beijing to Guangzhou, capital of south China's Guangdong Province, in the fastest train on the Beijing-Guangzhou high-speed railway. (Xinhua/Zhu Xiang)