A senior official with the All China Federation of Trade Unions (ACFTU) said in two years all trade unions nationwide will carry out collective negotiations on wages.

By 2012, more than 90 percent of enterprises in China should have trade unions, which would represent more than 92 percent of the nation's workers, said Wang Yupu, ACFTU Vice Chairperson.

Leaders of some grassroots organizations lack the knowledge of collective bargaining and local trade unions should be responsible for training them, he added.

About 80 percent of enterprises in China are privately run, according to Wang, who said trade unions must protect the interests of migrant workers and dispatched workers.