頷環 [颔环]

Jyutping ham5 waan4
Pinyin hàn huán

Definitions (Wiktionary)
  1. noun, Xiamen, Zhangzhou-Hokkien
    neckband (band worn around the neck as an ornament or protective device); necklet
    (syn.) 项圈, 項圈, 颈圈, 頸圈