What is "fangxiang"

The fangxiang (also fang xiang, fang hsiang; 方响 or 方響 in Chinese, pinyin: fāngxiǎng; also known in the West as the Chinese chang) is an organized-suspended (bianxuan) Chinese metallophone that has been used for over 1,000 years. Fangxiang is the only instrument type that is found in the Stone category of the eight sounds. It was first used in the Liang Dynasty (502—557 CE), and then standardized in the Sui and Tang dynasties mostly for court music.