South of Hang-chou Wan (Bay) below Shanghai, the China coastline changes from a smooth, flat topography to one of irregular, rocky promontories and numerous islands. Foochow, the Fugiu of Marco Polo, dates from the seventh century. Offshore the Ma-tsu Lieh-tao (Matsu and Pei-kan, or Changshu Islands) are heavily fortified Nationalist strongholds.