sentences:  Two submarines of this class, "S-52" and "S-53", along with two Soviet M-class submarines, and two s (under lease, "S-121" and "S-123") were handed to People's Liberation Army Navy in June 1954, thus becoming the foundation of the submarine force of the People's Republic of China.Two more S-class submarines, "S-24" and "S-25", were sold to China a few years later.Those purchased by China received new names, but the two leased "Shchuka"-class submarines did not.