GUANGZHOU, capital city of Guangdong Province, several years ago was known as an economic magnet. Millions of farm laborers from the villages swarmed the southern region of China looking for work. However, for the past two years, it began to suffer from a lack of workers.

The majority left Guangzhou and moved to the Yangtze River delta in Shanghai. There they were able to obtain higher salaries and better conditions. The migration of millions of w