Passengers walk out of the Beijing Railway Station in Beijing, capital of China, Oct. 7, 2013. China witnessed a travel peak on Monday, as many people were on their return trip on the last day of the seven-day National Day holiday. (Xinhua/Wang Zhen)

 Passengers wait for buses at a bus station in Chaoyang City, northeast China's Liaoning Province, Oct. 7, 2013. China witnessed a travel peak on Monday, as many people were on their return trip on the last day of the seven-day National Day holiday. (Xinhua/Bai Tiejun)

 Passengers wait for trains at the Suzhou Railway Station in Suzhou, east China's Jiangsu Province, Oct. 7, 2013. China witnessed a travel peak on Monday, as many people were on their return trip on the last day of the seven-day National Day holiday. (Xinhua/Wang Jiankang)

Passengers prepare to board a train at the Nanjing Railway Station in Nanjing, capital of east China's Jiangsu Province, Oct. 7, 2013. China witnessed a travel peak on Monday, as many people were on their return trip on the last day of the seven-day National Day holiday. (Xinhua/Yan Minhang) 

 A passenger carrying her child enters a railway station in Xuzhou City, east China's Jiangsu Province, Oct. 7, 2013. China witnessed a travel peak on Monday, as many people were on their return trip on the last day of the seven-day National Day holiday. (Xinhua/Huang Qijun)

 A boy follows his family members to enter a railway station in Qionghai City, south China's Hainan Province, Oct. 7, 2013. China witnessed a travel peak on Monday, as many people were on their return trip on the last day of the seven-day National Day holiday. (Xinhua/Meng Zhongde)

 A passenger arrives at the Zhengzhou Railway Station in Zhengzhou, capital of central China's Henan Province, Oct. 7, 2013. China witnessed a travel peak on Monday, as many people were on their return trips on the last day of the seven-day National Day holiday. (Xinhua/Li Bo)

 Vehicles run on a highway linking Changsha and Changde cities in central China's Hunan Province, Oct. 7, 2013. China witnessed a travel peak on Monday, as many people were on their return trips on the last day of the seven-day National Day holiday. (Xinhua/Long Hongtao)

 More city-bound vehicles than outward ones are seen on a highway to Guangzhou, capital of south China's Guangdong Province, Oct. 7, 2013. China witnessed a travel peak on Monday, as many people were on their return trips on the last day of the seven-day National Day holiday. (Xinhua/Lu Hanxin)

 More city-bound vehicles than outward ones are seen on a highway to Guangzhou, capital of south China's Guangdong Province, Oct. 7, 2013. China witnessed a travel peak on Monday, as many people were on their return trips on the last day of the seven-day National Day holiday. (Xinhua/Lu Hanxin)

 Passengers queue up to enter the Changsha Railway Station in Changsha, capital of central China's Hunan Province, Oct. 7, 2013. China witnessed a travel peak on Monday, as many people were on their return trips on the last day of the seven-day National Day holiday. (Xinhua/Long Hongtao)

 Passengers queue up to enter the Changsha Railway Station in Changsha, capital of central China's Hunan Province, Oct. 7, 2013. China witnessed a travel peak on Monday, as many people were on their return trips on the last day of the seven-day National Day holiday. (Xinhua/Long Hongtao)