The Regional Flag of the Hong Kong Special Administrative Region of the People's Republic of China depicts a white stylised five-petal Hong Kong orchid tree (Bauhinia × blakeana) flower in the centre of a Chinese red field. The design of the flag is enshrined in Hong Kong Basic Law, the territory's constitutional document, and regulations regarding its use, prohibition of use, desecration, and manufacture are stated in the Regional Flag and Regional Emblem Ordinance.

The original design of the flag of Hong Kong was unveiled on 4 April 1990 at the Third Session of the Seventh National People's Congress. The current design was approved on 10 August 1996 at the Fourth Plenum of the Preparatory Committee of the Hong Kong Special Administrative Region. The use of the flag is regulated by laws passed by the 58th executive meeting of the State Council held in Beijing. The flag was officially adopted and hoisted on 1 July 1997, during the handover ceremony marking the handover from the United Kingdom back to China.

A variant of the flag known as the Black Bauhinia has been used by anti-Chinese government protesters in Hong Kong, particularly during the 2019–2020 Hong Kong protests. In contrast of the protests, pro-government supporters often display the Chinese and Hong Kong flags. Wikipedia