In Chinese languages and the languages of neighboring countries, black tea is known as "red tea" (紅茶, Mandarin Chinese hóngchá; Japanese kōcha; 홍차, Korean hongcha), a description of the colour of the liquid; the term black tea refers to the colour of the oxidized leaves. In Chinese, "black tea" is a commonly used classification for post-fermented teas, such as Pu-erh tea; outside of China and its neighbouring countries, "red tea" more commonly refers to rooibos, a South African tisane.