After the 7th century AD, Songtsan Gambo sent 16 young talents to study in India, 15 of them died abroad, and only Thonmi Sambhota returned. He also invented the Tibetan language and translated many Buddhist scriptures. Later, he returned to his hometown Tumda village. He found that the land here was scarce, so he passed on the techniques of making Tibetan incense to the people for improving the lives of the villagers. He used the resources of the Tumba River to invent the water mill Tibetan incense, which should be the earliest Tibetan incenses in Tibet. It has been more than 1,300 years since then.