He was the creator of Tibetans-in-exile taxation system, or the Green Book, which has helped fund the exile government since 1972.
他开创了西藏流亡政府的税收系统，或称《绿皮书（英语：Green Book (Tibetan document)）》持有制度，该系统支持了流亡政府自1972年起的财政收入。