At the mouth of Leba Valley, on the west bank of the Tongtian River, an eight-line inscription is cut into the rock beside a Buddhist image. In 2024, scholars from Qinghai Minzu University revisited the lines and compared their letter forms with inscriptions farther inside the valley. They identified the text as Old Tibetan and proposed an early ninth-century date.
Weathering, cracks and missing sections shape what can still be read. Researchers follow surviving strokes and compare them with nearby inscriptions, treating the cliff as both an image surface and a written record.
