A U.S. official says China doesn't want to be seen as a threat, but rather wants respect.

That's part of the challenge facing Chinese President Hu Jintao who'll try to boost his country in the eyes of Americans when he meets today with President Bush.

For his part, Bush wants China's help to end nuclear standoffs in Iran and North Korea, and he wants to urge changes in Chinese economic, military and political policies.

U.S. complaints include allegations that China mistreats its citizens, that an undervalued currency hurts U.S. competition, that China's growing military strength could lead to conflict in the Taiwan Strait, and that Beijing has pursued energy deals with countries the United States considers tyrannical.