Much study of historical facts shows that it is in whereabouts of Zhengyang Beilu Xinyongshe at the southern end of Zhengyang Beilu, Yongchang Town, Longyang District, Baoshan.

• 更有人说在“今腾冲、德宏、临沧一带”。通过史籍查证，认为东汉永平年间，显宗所置的哀牢县址，应在保山隆阳区永昌镇正阳北路南端“正阳北路信用社”附近。