Biden seeks to reassure China on U.S. debt BEIJING (Reuters) - U.S. Vice President Joe Biden on Friday said China had "nothing to worry about" concerning the safety of its vast holdings of Treasury debt, while China's Premier Wen Jiabao gave a ringing endorsement of the resilience of the debt-ridden U.S. economy. feeds.reuters.com/~r/Reuters/PoliticsNews/~3/m_uKsfUtVzc/us-china-us-idUSTRE77I2MO20110819