U.S. ambassador urges China to lower trade barriers BEIJING (Reuters) - China must reduce barriers to foreign companies if it is to meet its own development goals, the U.S. ambassador said in Beijing on Tuesday in a speech that reflected foreign investors' growing frustration with the pace of economic reforms in the country. feeds.reuters.com/~r/Reuters/PoliticsNews/~3/MNA8biwymMY/us-china-usa-idUSTRE78J1AG20110920