These gunboats, of identical specifications, were named respectively Zhenbei ("Guard the north"), Zhendong ("Guard the east"), Zhennan ("Guard the south"), Zhenxi ("Guard the west"), Zhenbian ("Guard the frontier") and Zhenzhong ("Guard the interior").
Kapal perang ini, dengan spesifikasi yang sama, masing-masing diberi nama Zhenbei ("Penjaga utara"), Zhendong ("Penjaga timur"), Zhennan ("Penjaga selatan"), Zhenxi ("Penjaga barat"), Zhenbian ("Penjaga perbatasan") dan Zhenzhong ("Penjaga interior").