His tenure lasted from 1274 to his death in either 1279 or 1282 .
Rinchen Gyaltsen ( Wylie : rin chen rgyal mtshan ) ( 1238 -- 24 March 1279 ) was a Tibetan imperial preceptor at the court of the Mongol Yuan dynasty .
Rinchen Gyaltsen 's tenure lasted from 1274 to his death in either 1279 or 1282 .
Rinchen Gyaltsen ( Wylie : rin chen rgyal mtshan ) ( 1238 -- 24 March 1279 ) was a Tibetan imperial preceptor at the court of the Mongol Yuan dynasty .