FOREIGN employers have been warned they face legal action if they abuse their Chinese workers. At an international seminar in Tianjin, union leaders said many workers in foreign-invested enterprises were treated poorly, and pledged to safeguard their rights according to laws and labour contracts. By the end of last year, more than 32,000 unions were operating in foreign-funded enterprises, covering 40.6 per cent of those firms, Xinhua (the New China News Agency) said. Conference participants included unionists from Poland who were particularly concerned about the treatment of Chinese workers by foreign employers. The Trade Union Law of 1992 encouraged workers in foreign-funded companies to set up unions. Foreign and Chinese unofficial unionists say investigations have found widespread abuse.