Zhang Huan's *Callipers* is a striking large-scale work rendered in ash, charcoal, and resin on canvas, materials deeply tied to the artist's ongoing exploration of ritual, memory, and the human body. The use of temple ash — a signature element of Huan's practice — imbues the work with a spiritual and cultural weight, connecting the physical act of mark-making to themes of impermanence and transformation. The imagery of callipers, instruments of precise measurement, creates a compelling tension between scientific objectivity and the raw, organic texture of the ash-laden surface.