Tensions over subsidized Chinese export goods on foreign markets and industrial overcapacity has been the focus of US Treasury Secretary Janet Yellen during her visit to China. The dispute has also been a source of strain between the two powers during recent years. “I am particularly concerned about the impact of Chinese industrial overcapacity in certain sectors as a result of government support, and the impact it could have on the American economy,” Yellen said in a statement during her visit to the southern Chinese city of Guangzhou on Saturday. “These concerns are shared by our allies and …