About 3.44 million, or 82.73 percent, of private and foreign-funded companies in China had established labor unions as of the end of June, said Wang Yupu, Vice Chairman of the All-China Federation of Trade Unions, on July 30.

In the first half of the year, 99.29 million, or 72.95 percent, of the companies' staff joined labor unions.

Wang said that trade union organizations have been working on promoting collective salary negotiations between enterprises and workers, with the number of enterprises signing collective wage contracts increasing by 56.1 percent from 2010 to the current 1.74 million.