What is the name of the pendant hanging on the back of Hanfu necklace?

Fringe. The necklace in Hanfu accessories is called a garland, and the tassel hanging behind it is called a garland. Garlands can be divided into soft garlands and collar garlands. Generally, Tan Ling made in Tang Dynasty will look better with soft wreaths, which can better decorate the lines of collarbone and neck. Ming Hanfu can wear collar and soft ring, mainly in gorgeous style, with various gems embedded in the ring.