The first day cover of the "10th Anniversary of the Reunification of Hong Kong with China" and the souvenir cover of the stamp exhibition were signed and datestamped with special postmark by Mr Xu Anliang, Deputy Secretary General of Shenzhen Municipal People's Government (first left); Mr Tam Wing-pong, Postmaster General of Hongkong Post (second left) and Mr Zhang Yafei, Deputy General Manager of the China Post Group(third left).