Gold filigree head ornament in the form of five clouds, Qing dynasty, Qianlong reign (1736-1795), 3.5 cm long and 5.95 cm wide.  National Palace Museum, Taipei.

he knot is usually an ornament decorated in the center of the forehead. In addition to wearing the knot, the portraits of the imperial concubines Huixian and Chunfei in the Qianlong period also had a black fabric with a flame knot tied under the crown. The knots are mostly small in size, with gold as the base, or silk or emerald dots, and inlaid with precious stones and pearls. This piece is a flowing cloud triangle with a gemstone inlaid in the center. The decoration is symmetrical on the left and right, and slightly arc-shaped when viewed from the side, so as to fit the forehead. (Google traduction)