NEW : Obama to hold formal meeting with Chinese President Hu Jintao in Beijing . NEW : New U.S. poll is split on whether Chinese supports military threat . Obama tells students free stream of money a source of strength , despite sting . United States purchases millions of dollars in Chinese products each year .
NEW : Obama to hold formal talks with Chinese President Hu Jintao in Beijing . NEW : New U.S. poll shows split on whether Chinese pose military threat . Obama tells students free flow of info a source of strength , despite sting . United States imports billions of dollars in Chinese products each year .