STAFF of the South China Morning Post yesterday celebrated the official opening of its editorial offices in Dorset House, Quarry Bay. Editorial staff joined Post Editor-in-Chief David Armstrong, who officiated at the traditional Chinese opening ceremony, in cutting a suckling pig to bring good luck. The move to the 28th and 29th floors of the office block from the nearby Morning Post Building, accompanies the relocation of the Post's operations from Quarry Bay to its new headquarters, the Morning Post Centre, in Tai Po. The telephone number for the new offices remains 2565 2222. The number for the circulation, accounts and administration departments, along with all sections of the Sunday Morning Post, special reports, Young Post and Technology Post is 2565 2565. Advertising hotlines remain 2565 8822 for classified advertising, 2565 7272 for the classified fax, and 2565 2435 for display advertising.