What country went back under China's control recently?

Political geography is the field of human geography that is concerned with the study of both the spatially uneven outcomes of political processes and the ways in which political processes are themselves affected by spatial structures. Conventionally political geography adopts a three-scale structure for the purposes of analysis with the study of the state at the centre, above this is the study of international relations (or geopolitics), and below it is the study of localities. The primary concerns of the sub-discipline can be summarised as the inter-relationships between people, state, and territory.

The origins of political geography lie in the origins of human geography itself and the early practitioners were concerned mainly with the military and political consequences of the relationships between physical geography, state territories, and state power. In particular there was a close association with regional geography, with its focus on the unique characteristics of regions, and environmental determinism with its emphasis on the influence of the physical environment on human activities. This association found expression in the work of the German geographer Friedrich Ratzel who, in 1897 in his book Politische Geographie, developed the concept of Lebensraum (living space) which explicitly linked the cultural growth of a nation with territorial expansion, and which was later used to provide academic legitimation for the imperialist expansion of the German Third Reich in the 1930s.

Bolshoi Ussuriysky Island (Russian: о́стров Большо́й Уссури́йский), or Heixiazi Island (simplified Chinese: 黑瞎子岛; traditional Chinese: 黑瞎子島; pinyin: Hēixiāzi Dǎo), is a sedimentary island at the confluence of the Ussuri and Amur rivers. It is divided between the People's Republic of China (PRC) and Russia. It has an area of about 327 to 350 km² and is bounded closely by Yinlong Island (Tarabarov Island), and over ninety islets (in Chinese, Heixiazi may refer only to the large island or to the island group collectively). Its position at the confluence of the Amur and the Ussuri and right next to the major Russian city of Khabarovsk, has given it great strategic importance.

Khabarovsk Krai (Russian: Хаба́ровский край, tr. Khabarovsky kray, IPA: [xɐˈbarəfskʲɪj kraj]) is a federal subject of Russia (a krai), located in the Russian Far East. It lies mostly in the basin of the lower Amur River, but also occupies a vast mountainous area along the coastline of the Sea of Okhotsk, an arm of the Pacific Ocean. The administrative center of the krai is the city of Khabarovsk. Population: 1,343,869 (2010 Census).

The indigenous people of the area are various Tungusic peoples (Evenks, Negidals, Ulchs, Nanai, Oroch, Udege) and Amur Nivkhs.

The controversy regarding the political status of Taiwan (or the "Taiwan Issue" as referred to by the Communist Party of China) hinges on whether Taiwan, Penghu, Kinmen, and Matsu should remain effectively independent as territory of the Republic of China (ROC), become unified with the territories now governed by the People's Republic of China (PRC), or formally declare independence and become the Republic of Taiwan; as well as whether its existence and status as a state ("country") is legitimate and recognized by the international community.

Currently, Taiwan, Penghu, Kinmen, Matsu, and some other minor islands effectively make up the jurisdiction of the state with the official name of Republic of China but widely known as "Taiwan". The ROC, which took control of Taiwan (including Penghu and other nearby islands) in 1945, ruled mainland China and claimed sovereignty over Outer Mongolia (now Mongolia) and Tannu Uriankhai (part of which is present day Tuva, Russia) before losing the Chinese Civil War and relocating its government to Taipei, Taiwan in December 1949.

The Sino-Soviet border conflict (中苏边界冲突) was a seven-month military conflict between the Soviet Union and China at the height of the Sino-Soviet split in 1969. The most serious of these border clashes occurred in March 1969 in the vicinity of Zhenbao Island (珍宝岛) on the Ussuri River, also known as Damanskii Island (Остров Даманский) in Russia. Chinese historians most commonly refer to the conflict as the Zhenbao Island incident (珍宝岛自卫反击战) The conflict was finally resolved with future border demarcations.

Bolshoi Ussuriysky Island (Russian: о́стров Большо́й Уссури́йский), or Heixiazi Island (simplified Chinese: 黑瞎子岛; traditional Chinese: 黑瞎子島; pinyin: Hēixiāzi Dǎo), is a sedimentary island at the confluence of the Ussuri and Amur rivers. It is divided between the People's Republic of China (PRC) and Russia. It has an area of about 327 to 350 km² and is bounded closely by Yinlong Island (Tarabarov Island), and over ninety islets (in Chinese, Heixiazi may refer only to the large island or to the island group collectively). Its position at the confluence of the Amur and the Ussuri and right next to the major Russian city of Khabarovsk, has given it great strategic importance.