David Yu, chairman of the board of The Summit National Bank, has been appointed chair of the International Delegations Council of the Atlanta Chamber of Commerce.  In 1993, the Chamber’s International Department hosted more than 50 delegations and more are expected to pass through Atlanta this year.  The Council will stimulate trade and investment by bringing together members of the Atlanta business community and international visitors who are interested in doing business in Atlanta.  For more information, call Marcia Briscoe of the Chamber at (404) 586-8464.