Arxan-chhī (Bông-kó͘-gí: ᠷᠠᠰᠢᠶᠠᠨ
ᠬᠣᠲᠠ
, Hàn-gí: 阿爾山市) sī Tiong-kok Lāi-bông-kó͘ Chū-tī-khu Hinggan-bêng ê chi̍t ê koān-kip-chhī.