Chinese guardian lions, or imperial guardian lions, are a traditional Chinese architectural ornament. Typically made of stone, they are also known as stone lions or shishi (石獅; shíshī). They are known in colloquial English as lion dogs, foo dogs, or fu dogs. The concept, which originated and became popular in Chinese Buddhism, features a pair of Asiatic lions — often one male with a ball that represents the material elements and one female with a cub that represents the element of spirit — that were thought to protect the building from harmful spiritual influences and harmful people that might be a threat. Used in imperial Chinese palaces and tombs, the lions subsequently spread to other parts of Asia including Japan (see komainu), Korea, Mongolia, the Philippines, Tibet, Thailand, Myanmar, Vietnam, Sri Lanka, India, Nepal, Cambodia, Laos, Singapore, and Malaysia.

Statues of guardian lions have traditionally stood in front of Chinese Imperial palaces, Imperial tombs, government offices, temples, and the homes of government officials and the wealthy, and were believed to have powerful mythic protective benefits. They are also used in other artistic contexts, for example on door-knockers, and in pottery. Pairs of guardian lion statues are still common and symbolic elements at the entrances to restaurants, hotels, supermarkets and other structures, with one sitting on each side of the entrance, in China and in other places around the world where the Chinese people have immigrated and settled, especially in local Chinatowns.^{[citation needed]}

The lions are usually depicted in pairs. When used as statuary, the pair would consist of a male leaning his paw upon an embroidered ball (in imperial contexts, representing supremacy over the world) and a female restraining a playful cub that is on its back (representing nurture).

Guardian lions are referred to in various ways depending on language and context. In Chinese, they are traditionally called simply shi (Chinese: 獅; pinyin: shī) meaning lion—the word shi itself is thought to be derived from the Persian word šer. Lions were first presented to the Han court by emissaries from Central Asia and Persia, and were already popularly depicted as guardian figures by the sixth century AD. Today, the guardian lions are more usually specified by reference to the medium or material, for example:

and less commonly:

In English and several Western languages, the guardian lions have often been referred by a multitude of names such as: "Fu Dogs", "Foo Dogs", "Fu Lions", "Fo Lions", and "Lion Dogs". The term "Fo" or "Fu" may be transliterations of 佛 (pinyin: fó) 'Buddha' or 福 (pinyin: fú) 'prosperity'. However, Chinese references to guardian lions are seldom prefixed with these words and are never referred to as "dogs".

Reference to guardian lions as dogs in Western cultures may be due to the Japanese reference to them as "Korean dogs" (狛犬・高麗犬) due to their transmission from China through Korea into Japan. It may also be due to the misidentification of the guardian lion figures as representing certain Chinese dog breeds such as the Chow Chow (鬆獅犬; sōngshī quǎn; 'puffy-lion dog') or Pekingese (獅子狗; Shīzi Gǒu; 'lion dog').

The lions are traditionally carved from decorative stone, such as marble or granite, or cast in bronze or iron. Because of the high cost of these materials and the labor required to produce them, private use of guardian lions was traditionally reserved for wealthy or elite families. Indeed, a traditional symbol of a family's wealth or social status was the placement of guardian lions in front of the family home. However, in modern times less expensive lions, mass-produced in concrete and resin, have become available and their use is therefore no longer restricted to the elite.