A group of eight gold hairpins, Song to Yuan dynasty Varying sizes from 15.5 cm to 19.2 cm long (8). Hairpins made from folded long pins such as this example are called zhegu chai and were popular during the Song and Yuan dynasties. Simpler designs such as plain and ribbed examples are associated with the Song dynasty. Twisted examples, such as those in this lot, emerged as a new trend during the Yuan dynasty, known as ' chi -tiger' pins. The top fold of the pins are chiselled into 'floral' designs, and the first 'twists' immediately below the 'flower', the two ' chi -tigers'. The combination of the flower and the tigers are the most essential elements in such designs. Hairpins during the Song and the Yuan dynasties are made of solid gold, hence are heavier than the later pieces. For similar examples, see Yang Zhishui, Gold and Silver Jewellery in Ancient China, Volume 1, Palace Museum Publishing, China, 2018, pp. 155-56, 211211