China

China, the oldest and most populous nation on Earth in the 20th century (DW: Four to Doomsday), was located on the continent of Asia.

Early history
Circa 5519 BC, Monarch abducted Lin Futu and other natives of China. (DW: Four to Doomsday)

Medieval
The Venetian Marco Polo travelled throughout China (then called Cathay) as the then-emperor Kublai Khan would not permit him to leave and return home. In 1289, The First Doctor, Ian Chesterton, Barbara Wright and Susan met him during his travels. (DW: Marco Polo)

19th century
The Second Doctor, Jamie McCrimmon and Zoe Heriot visited China in 1800. (TN: Foreign Devils)

Circa 1860, Magnus Greel arrived in China from the year 5000. Li H'sen Chang found him and, believing him to be the god Weng-Chiang, became his devoted follower. (DW: The Talons of Weng-Chiang) In an unrelated incident, five years later, The First Doctor, Ian Chesterton, Barbara Wright and Vicki visited China. (PDA: The Eleventh Tiger)

20th century
Troopers from the Boxer Rebellion were kidnapped by the War Lords for use in their war games. (DW: The War Games)

In 1936, the Doctor joined Mao Tse-Tung on the Long March. (DW: The Mind of Evil) Mao would take control of the country thirteen years later.

In 1937, The Fourth Doctor and Romana visited China. (MA: The Shadow of Weng-Chiang)

In 1967, Fitz Kreiner was taken to China by Red Army soldiers. (EDA: Revolution Man)

In the 1970s, China set General Cheng Teik as a delegate to the first World Peace Conference in London. He was killed by his aide, Chin Lee, who was under the control of The Master. (DW: The Mind of Evil) Perhaps as a result of this, China was very reluctant to participate in the second World Peace Conference until persuaded by Sir Reginald Styles. (DW: Day of the Daleks)

In 1997, China gained sovereignty over Hong Kong. In advance of this, agents of China's Public Security Bureau created the fake Tao Te Lung triad to lure in potential kingpins and neutralise them. (PDA: Bullet Time)

21st century
By the year 2009, China was part of the worldwide nuclear grid overseen by UNIT. (DW: The Poison Sky) An Osterhagen station was located there. (DW: The Stolen Earth)

On Christmas Day 2009 when The Master turned every human into copies of him, all 2.5 Million soldiers of the Chinese military came under his command. (DW: The End of Time)

In 2048, China was taken over by Hong Kong. (NA: St Anthony's Fire)

Chinese scientist Chung Sen experimented with time travel. (DW: Invasion of the Dinosaurs)

Alternative timelines

 * In the 1970s, China turned to the UN for help after alien parasites began causing brutal riots; with the help of Ke Le, they were able to use these parasites to brainwash prisoners into the law-enforcing Ke Le Divisions of the army. In 1997, in an attempt to 'wash their hands' of the Divisions, they destroyed the parasites, inadvertently causing the Divisions to go on berserker rampages. (DWU: Sympathy for the Devil)