Kong made the remarks at a regular press conference, when asked to comment on the fact that the American Institute in Taiwan (AIT) invited Taiwan's political figures from the "Executive Yuan" and "Legislative Yuan" to attend a party held on July 3 in Taipei to celebrate the US Independence Day.
Kong said AIT's actions did not conform to its status and function as a non-governmental organization and violated the principles of the three Sino-US joint communiques and the relevantpromises made by the United States.
China has shown strong opposition and dissatisfaction with AIT's actions and made stern representations to the United States, Kong said.
He urged the United States to recognize the importance and sensitivity of the Taiwan issue, abide by promises, correct mistakes and stop upgrading relations with Taiwan so as to avoid impairing Sino-US relations and the common interests of the two nations.