U.S . President Obama : The sanctions will ` ` bite hard '' China is ` ` firmly committed '' to sanctions on the Korean peninsula , according to U.N. says . The resolution will clamp down on North Korea 's officials , banks and cargo . They say China is a key to determining whether the sanctions affect North Korea .
U.S . Ambassador Rice : The sanctions will `` bite hard '' China is `` firmly committed '' to peace on the Korean peninsula , ambassador to U.N. says . The resolution will clamp down on North Korea 's officials , banks and cargo . Analysts say China is a key to determining whether the sanctions deter North Korea .