China launched 10 nuclear submarines between 2021 and 2025, surpassing the U.S. production rate for the first time. Between 2022 and 2025, analysts assessed that 7 to 8 Type 093B attack submarines were built at Bohai Shipyard — exceeding the total number of nuclear attack submarines China produced across the previous several decades. Satellite imagery shows Bohai has expanded with parallel build bays capable of assembling multiple hulls simultan…