BEIJING — U.S. Treasury Secretary Janet Yellen kicked off her first full day of official meetings in China with discussion about overcapacity concerns and encouragement to pursue market-oriented reforms. Yellen arrived in the southern Chinese city of Guangzhou late on Thursday and is set to travel to Beijing on Saturday, where she will stay until Tuesday. It is her second trip to China as Treasury secretary. Ahead of a scheduled meeting Friday with Vice Premier He Lifeng, Yellen met with Wang Weizhong, governor of Guangdong province, of which Guangzhou is the capital. "Throughout my engagements with my counterparts, I will stress that a healthy economic relationship can bring significant benefits for both our economies," Yellen said in prep