Geography of Taiwan its narrowest. Part of the continental shelf, the Strait is no more than deep, and has become a land bridge during glacial periods. To the south, the island of Taiwan is separated from the Philippine island of Luzon by the -wide Luzon Strait. The South China Sea lies to the southwest, the East China Sea to the north, and the Philippine Sea to the east. Smaller islands of the archipelago include the Penghu islands in the Taiwan Strait west of the main island, with an area of , the tiny islet of Xiaoliuqiu off the southwest coast, and Orchid Island
Nationality law of the People's Republic of China restrictions as long as they arrive from a third country. In accordance with the "Act Governing Relations between the People of the Taiwan Area and the Mainland Area" of the ROC, any ROC national with Household Registration (ROC nationals with full citizenship rights in Taiwan) who obtains a passport issued to Mainland residents of the PRC or hukou of Mainland China, automatically loses his Household Registration in Taiwan, which in turn causes the loss of the person's citizenship rights in the ROC (since he or she has already obtained the "de facto" citizenship of Mainland China). However, the person does