 Several prototypes are built by different shipyards.They were the Type 0105 from Luda (3), the Type 0108 from Qingdao (1), the Type 0109 from Shanghai (10), and the Type 0110 from Guangzhou (3).Displacement of the prototypes varied from 100-150 t, speed varied from , with different weapon arrangements including 57IIx1, 37IIx1, 14.5IIx2 or 37IIx2,14.5IIx2.