Passengers place their luggages on train 3805 from Guangzhou, capital of south China's Guangdong Province, to Chongqing, southwest China, Feb. 4, 2015. The 40-day travel frenzy known as "chunyun", the hectic period through the Chinese lunar New Year, or the Spring Festival, which falls on Feb. 19 this year, began on Feb. 4 and will last until March 16. Train 3805 is the first chunyun train from Guangzhou. (Xinhua/Wang Shen)

BEIJING, Feb. 4 (Xinhua) -- The world's most populous country on Wednesday kicked off its largest seasonal travel rush, when it is expected to see some 2.8 billion trips on road, 3.4 percent higher than that of last year during the 40-day Lunar New Year travel.