Around this time of the year, the edge of the Taklamakan desert in far western China should be overflowing with people. For decades, every spring thousands of Uighur Muslims would converge on the Imam Asim shrine, a group of buildings and fences surrounding a small mud tomb believed to contain the remains of a holy warrior from the eighth century.
Pilgrims from across the Hotan oasis would come seeking healing, fertility, and absolution, trekking through the sand in the footsteps of those ahead of them. It was one of the largest shrine festivals in the region. People left offerings and tied pieces of cloth to branches, markers of their prayers.