Trafficking in human beings, also known as "irregular migration", is one of the most pressing and complex global challenges to human security today. It reaches across borders to affect most of the countries in the world and creates common concerns for security and development. Since 1979 Chinese migrants, particularly from Fujian, Zhejiang and the provinces of Northeast China, have constituted a major component of international irregular migration. In fact, China may provide the largest number of East Asian irregular migrants to the international labor market. But why are Chinese irregular immigrants mainly from Fujian, Zhejiang and Northeast China? What amalgam of factors has motivated a huge cohort of peasants, fishermen and laid-off workers to leave China illegally? What are the major patterns exhibited in China's irregular emigration? What kind of role is being played by social networks in this international migration? What are the Chinese government polices towards irregular outflow? How could people correctly understand current irregular migratory waves from China? Based on fieldwork conducted in coastal China villages and a number of Chinese migrant communities overseas, this seminar tries to answer these questions while presenting speaker's own observation and comments.