and human development. The political status of Taiwan is contentious. The ROC no longer represents China as a member of the United Nations, after UN members voted in 1971 to recognize the PRC instead. The ROC maintained its claim of being the sole legitimate representative of China and its territory, although this has been downplayed since its democratization in the 1990s. Taiwan is claimed by the PRC, which refuses diplomatic relations with countries that recognise the ROC. Taiwan maintains official diplomatic relations with 13 out of 193 UN member states and the Holy See, though many others maintain unofficial diplomatic ties through representative offices and institutions that function as de facto embassies and consulates. International organisations in which the PRC participates either refuse to grant membership to Taiwan or allow it to participate only on a non-state basis under various names. Domestically, the major political contention is between parties favouring eventual Chinese unification and promoting a pan-Chinese identity, contrasted with those aspiring to formal international recognition and promoting a Taiwanese identity; into the 21st century, both sides have moderated their positions to broaden their appeal. Etymology Name of the island Various names for the island of Taiwan remain in use, each derived from explorers or rulers during a particular historical period. In his Daoyi Zhilüe (1349), Wang Dayuan used "Liuqiu" as a name for the island of Taiwan, or the part of it closest to Penghu. Elsewhere, the name was used for the Ryukyu Islands in general or Okinawa, the largest of the islands; the name Ryūkyū is the Japanese form of Liúqiú. The name also appears in the Book of Sui (636) and other early works, but scholars cannot agree on whether these references are to the Ryukyus, Taiwan or even Luzon. The name Formosa () dates from 1542, when Portuguese sailors sighted an uncharted island and noted it on their maps as Ilha Formosa ("beautiful island"). The name Formosa eventually "replaced all others in European literature" and remained in common use among English speakers into the 20th century. In 1603, a Chinese expedition fleet anchored at a place in Taiwan called Dayuan, a variant of "Taiwan", and met with the native chieftain named Damila. In the early 17th century, the Dutch East India Company established a commercial post at Fort Zeelandia (modern-day Anping, Tainan) on a coastal sandbar called "Tayouan", after their ethnonym for a nearby Taiwanese aboriginal