The Riga kits were assembled by the Huangpu Shipyard in Guangzhou, and the Hudong Shipyard in Shanghai, from 1955 to 1958. These ships formed the PLAN's backbone in the 1950s and 1960s.
From 1955 to 1958, the Huangpu Shipyard in Guangzhou and the Hudong Shipyard in Shanghai assembled the Riga vessels. In the following decades, these ships played a crucial role as the backbone of the PLAN's naval forces.