Longrig Dandar, a Mongolian native of Kalak, was born in 1842 and died in 1915. Being a famous Mongolian physician converted to Buddhism when he was a boy, he was proficient in "Five Rig-pa", especially fond of gSo-ba rig-pa with high achievements, and was respected as wonderful physician in Mongolian region. Though he was oppressed when he was young, but was later recommended by XIII Dalai Lama. He was famous in local region. He wrote and published 5 medical books, including Helile (Chebula) jing zhu jie yin an jing, Ta jiao de, exerting very profound influence in Mongolian medical province.