The Zhou-class submarine is a class of Nuclear attack submarines designed by the People's Liberation Army Navy. The first images of the Zhou-class appeared in April 2022, in drydock at Huludao Port. The Zhou-class submarine was notably longer than the Type 093 or Type 094,[1] although reporters from Reuters stated it was unclear whether the class represented a new model, or an upgrade of an existing class.[2] Only one submarine in the class has been built, which in September 2024, was revealed by aerial photographs to have sunk in May or June while under construction.[3][4]