Shanku is a generic term which refers to a two-piece set of attire in Hanfu, which is typically composed of a youren yi, a Chinese upper garment which typically overlaps and closes on the right side which could be called shan, ru, ao, and a pair of long trousers ku. 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 household. 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.

Garment collars in hanfu are diverse and come in several shapes, including jiaoling, duijin, yuanling, liling, fangling, tanling. Some forms of collars were indigenous to China while others had been adopted from the Hufu of other non-Han Chinese ethnic minorities and/or from the clothing worn by foreigners.