Use a knarled branch naturally curved in a semicircle with three naturally projecting legs. Polish to a smooth luster. Positioned on a bed or mat, it can support the arm, feet, or head. I have also seen depictions in paintings with ancient men reclining with such stands supporting the feet—the make also curiously antique.
Wen Zhenheng, Superfluous Things (Zhangwu zhi)
Late Ming period.