The Sin Hung-class hydrofoil torpedo boat is a hydrofoil torpedo boat (PTH) in service with the Korean People's Navy.
The class is based on the same hull as the Sin Hung-class torpedo boat, and Sin Hung-class patrol boat.
[1] The Sin Hung class were being built by at least 1984, and possibly before then.
Although it appears possible that a non-hydrofoil Sing Hung-hulled torpedo boat could be transformed into hydrophilic ones, there has been no evidence that the Korean People's Navy have built any of them this way.
[1] The hydrophilic Sin Hung class has larger sponsons than the non-hydrofoil Sin Hung class, in order to accommodate the hydrofoil mechanism.