HONG KONG — Public opinion surveys taken in the United States and other countries around the world show that China's image has been badly dented in the wake of widespread reports of unsafe food, toxic toothpaste, dangerous toys and poisonous drugs.

A recent NBC News/Wall Street Journal poll showed that 65 percent of Americans have little or no confidence that food imported from China is safe to eat. And a Zogby poll shows that 82 percent of Americans are concerned about buying goods from China, with nearly two-thirds saying they would be willing to take part in a boycott of Chinese goods until Beijing implements more stringent safety regulations.

The negative image of China is by no means limited to the quality of its exports. In a Pew Global Attitudes survey released in late June, the percentage of Americans with a favorable opinion of China dropped from 52 percent in May 2006 to 42 percent in May 2007.