More than 50,000 migrant workers are estimated to leave the manufacturing hub of the Pearl River Delta on motorbikes in the coming days and return to Guangxi Zhuang autonomous region and Guizhou province to be with their families for Spring Festival. (Photo/Xinhua)

A volunteer helps a migrant worker to repair his motorcycle in Fengkai county, South China's Guangdong province on Jan 11, 2012, as he makes his way from the Pearl River Delta back home for Spring Festival. (Photo/Xinhua)

More than 50,000 migrant workers are estimated to leave the manufacturing hub of the Pearl River Delta on motorbikes in the coming days and return to Guangxi Zhuang autonomous region and Guizhou province to be with their families for Spring Festival. (Photo/Xinhua)

More than 50,000 migrant workers are estimated to leave the manufacturing hub of the Pearl River Delta on motorbikes in the coming days and return to Guangxi Zhuang autonomous regions and Guizhou province to be with their families for Spring Festival. (Photo/Xinhua)

It is probably one of the world’s biggest group motorbike rides. Each year tens of thousands of migrant workers load their belongings on to the back of their bikes and form a convoy home for the Chinese New Year. More than 50,000 migrant workers are estimated to leave the manufacturing hub of the Pearl River Delta on motorbikes in the coming days and return to provinces in the south to be with their families for Spring Festival. On Jan 11, thousands began that journey forming a sea of motorbikes along the 321 national highway between South China's Guangdong province and Guangxi Zhuang autonomous region.