Phi Fa is a ghost in the folklore of the country that is bordered by what country on its southwest?
Laos: Laos ( , , , or ; Lao: ລາວ , ] , "Lāo"), officially the Lao People's Democratic Republic (Lao: ສາທາລະນະລັດ ປະຊາທິປະໄຕ ປະຊາຊົນລາວ, "Sathalanalat Paxathipatai Paxaxon Lao") or commonly referred to its colloquial name of Muang Lao (Lao: ເມືອງລາວ, "Muang Lao"), is a landlocked country in the heart of the Indochinese peninsula of Mainland Southeast Asia, bordered by Myanmar (Burma) and China to the northwest, Vietnam to the east, Cambodia to the southwest, and Thailand to the west and southwest.
i don't know