US-China ties need more working-level dialogues, not just summits: business chamber. The president of the American Chamber of Commerce in China (AmCham China) has urged Beijing and Washington to push more negotiations down to working-level officials, saying businesses need greater long-term stability in bilateral ties than leader-level diplomacy alone can provide. Michael Hart, president of the chamber, said American businesses were encouraged by the unprecedented frequency of meetings between the presidents of China and the.