Lu Laofa (R), a 40-year-old migrant worker from southwest China's Guizhou Province, and his children make a free phone call with their relatives at the railway station of Hangzhou, capital of east China's Zhejiang Province, Jan. 31, 2010. The railway station provides free phone call service for migrant workers during the Spring Festival travel peak. Some 20 million migrant workers in Zhejiang Province began to return home for Spring Festival which falls on Feb. 14 this year.