The bipa is a pear-shape lute that is a traditional Korean musical instrument. It has the same Central Asian roots as the Chinese pipa and was introduced through the Silk Road to Goguryeo and Silla. There are two major types of bipa: the four stringed dang-bipa (당비파 / 唐琵琶) and the five stringed hyang-bipa (향비파 / 鄕琵琶). While dang-bipa was a Tang-style pipa first introduced from the Chinese Tang dynasty and localized over time to have Korean characteristics, hyang-bipa was created in the Korean Kingdom of Silla. The instrument is also related to other derivatives such as Vietnamese đàn tỳ bà and the Japanese biwa.