The village's midway boundary is marked by the home of former village chief Lin So, with wards 1-9 constituting upper Erh-lung (Ch'i-wu-lan), while wards 10-16 make up lower Erh-lung (Chou-tzu-wei).
村子以老村長林趖家為分界，前一至九鄰是上二龍淇武蘭，後十至十六鄰則是下二龍洲仔尾。