 Both of Type 010 and T-43 class minesweepers can be used as minelayers and submarine chasers, but the T-43 class cannot be used for patrol roles.Drastic changes were made in comparison to the original Soviet Project 254 design, with total of 818 modifications / upgrades were applied to the Type 010 design, which was finalized in December 1981, 23 years after the first Type 6610 entered service, and the prolonged development was mainly due to the political turmoil in China.The several units of the original T-43 class minesweepers transferred from former-Soviet Union have all being retired from active service, placed into reserve fleets subordinated to naval militia for weapon training, while some of the Type 010 class minesweepers remain active despite their age and obsolescence.