Kŏlsa Piu
| Kŏlsa Piu | |||||||
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| Chinese name | |||||||
| Traditional Chinese | 乞四比羽 | ||||||
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| Korean name | |||||||
| Hangul | 걸사비우 | ||||||
| Hanja | 乞四比羽 | ||||||
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Kŏlsa Piu (Korean: 걸사비우; Hanja: 乞四比羽), also rendered as Qisi Biyu, was a 7th-century military leader of Baishan Mohe ancestry. Kŏlsa Piu took an active part in Balhae's effort for autonomy against the Tang dynasty. Kŏlsa Piu died in the Battle of Tianmenling, in which Balhae achieved victory and declared autonomy.