BEIJING (Xinhua) -- The world's top anti-unionist Wal-Mart saw a new trade union set up in one of its outlets in the southern China city of Shenzhen early Tuesday morning, where the world's leading retailer locates its China headquarters.

The trade union of the Wal-Mart Dafen Store in Shenzhen was installed at around one hour Tuesday morning despite "repeated and various obstacles," an official with the All-China Federation of Trade Unions (ACFTU) said.

The ACFTU official said that the previous two Wal-Mart unions in the city, set up in August 4 and 6 respectively, have met with no or little difficulties. Wal-Mart China, however, told Xinhua earlier that the company had not been officially notified about such union activities in advance.

At press time, five trade unions have been set up in Wal-Mart China stores.