Wikipedia
Zhongnanhai is an imperial garden in Imperial City, Beijing, China adjacent to the Forbidden City; it serves as the central headquarters for the Communist Party of China and the State Council (Central government) of the People's Republic of China. The term Zhongnanhai is closely linked with the central government and senior Communist Party officials. It is often used as a metonym for the Chinese leadership at large (in the same sense that the term White House frequently refers to the President of the United States and his associates, and the term Blue House frequently refers to the South Korean equivalents). The state leaders, including Xi Jinping and Li Keqiang, and other top CPC and PRC leadership figures carry out many of their day-to-day administrative activities inside the compound, such as meetings with foreign dignitaries. China Central Television frequently shows footage of meetings inside the compound, but limits its coverage largely to views of the interior of buildings.
Zhongnanhai is a brand of cigarettes in China; It is highly popular and holds a large market share in Beijing. It is also popular in Japanese market as well, for its light flavor.
The name Zhongnanhai is also that of a central government complex in Beijing. Zhongnanhai cigarettes are generally produced in seven varieties: 1 mg, Menthol 1 mg, 3 mg, 5 mg, 8 mg, "Special" 8 mg, and 10 mg, referring to tar content. The official website refers to other varieties such as "12 mg" and "Red", which, however, are reported not to be widely available on the Chinese market. The pack text states that the cigarettes are made with "a choice blend of the world's finest tobaccos and herb".
Zhongnanhai cigarettes used to be specially made cigarettes for Chairman Mao Zedong in late 1960s.
The Chinese indie-rock band Carsick Cars dedicated a song called "Zhong nan hai" to the cigarette brand.