NEW : Obama to hold formal talks with Chinese President Hu Jintao in Beijing . NEW : China says it will not allow any more U.S. military bases on its soil, and has vowed to take a tougher stance against the United States if Washington continues to build new facilities there. Obama tells students free flow of info a source of strength , despite sting . China regularly cracks down on its religious and ethnic minorities , keeps tight reins on the media and censors the Internet . United States imports billions of dollars in Chinese products each year .
NEW : Obama to hold formal talks with Chinese President Hu Jintao in Beijing . NEW : China says it will not allow any more U.S. military bases on its soil, and has vowed to take a tougher stance against the United States if Washington continues to build new facilities there. Obama tells students free flow of info a source of strength , despite sting . United States imports billions of dollars in Chinese products each year .