Shanku (simplified Chinese: 衫裤; traditional Chinese: 衫褲; pinyin: shānkù; lit. 'shirt trousers'; see terminology) is a generic term which refers to a two-piece set of attire in Hanfu, which is typically composed of a yòurèn yī (右衽衣), a Chinese upper garment which typically overlaps and closes on the right side which could be called shan (衫), ru (襦), ao (袄; 襖), and a pair of long trousers called ku (裤; 褲). As a form of daily attire, the shanku was mainly worn by people from lower social status in China, such as labourers, shopkeepers, or retainers from wealthy households. The shanku was originally worn by both genders. Up until the mid-20th century, it was popular in China and outside of China where it was worn by overseas Chinese in countries, such as Singapore, Malaysia, Suriname, etc. It is still worn in present-day China and can be found in rural areas.

Shanku is sometimes referred as aoku (袄裤; 襖褲; 'coat trousers'), ruku (襦裤; 襦褲; 'jacket trousers'), and also known as samfu in English or samfoo (pronunciation: / (ˈsæmfuː) /) in British English following its Cantonese spelling.

The terms duanda (短打), duanhe (短褐; 'short brown') or shuhe (竖褐; 'vertical brown') typically refer to the two-piece set composed of an upper garment which is generally above and below the hips and knees and a pair of trousers, both made out of coarse cloth. This was generally worn by people doing manual labour, such as farm work, and by martial artists.

The generic term kuzhe (袴褶; 'jacket trousers'), also called kuxi (袴褶), is typically used to refer to military or riding style attire which is composed of a jacket or coat and trousers. According to the Shiming, the coat, xi (褶); (sometimes referred to as zhe, typically used as part of the kuxi), was a xi (襲). A xi (襲) was a paofu with a zuoren closure according to the Shuowen Jiezi (說文解字). The term daxi (大褶; 'big coat') also existed, but they were only long enough to cover the knees, which suggest that the other forms of xi were shorter than knee-length. Although the kuxi/kuzhe attire were oftentimes associated with Hufu, some of these garment items and styles were in fact Chinese innovations.

In the English language, shanku is commonly written as samfoo in British English or samfu. According to the Collins English Dictionary, the term samfu (pronounced: /ˈsæmfuː/) originated from the combination of the Chinese (Cantonese) words sam (dress) and fu (trousers).

The Oxford Advanced Learner's Dictionary and the Concise Oxford English Dictionary indicate that the term samfu originated in the 1950s from the Cantonese term shaam foò, with shaam meaning 'coat' and foò meaning 'trousers'. Among English dictionaries, there are variations in the definition of samfu. The Collins English Dictionary defines it as being:

"A style of casual dress worn by Chinese women, consisting of a waisted blouse and trousers".

The Oxford Learner's Advanced Dictionary defines it as being: