Job-hiring posts hang on the wall at a job center in Hangzhou, capital city of East China's Zhejiang province on Dec 30 2010. Migrant workers shortage occurs one month before China's Spring Festival in Zhejiang province as many of them choose to go back to hometown. Manufacturing companies start to worry about the vacant positions in production lines. [Photo/Xinhua]

A woman works in production line as many of her colleagues go back to hometown in a local company in Yiwu, East China's Zhejiang province on Dec 30,2010. [Photo/Xinhua]