According to sources cited by WSJ, the incident occurred at the end of May or the beginning of June this year at a shipyard near Wuhan. This is reported by zamon.uz here.
According to the information, expanding the naval forces, including the fleet of nuclear submarines, is considered one of the top priorities of the PRC's armament program.
The United States does not have information about whether there was nuclear fuel on the Chinese submarine at the time of its sinking.
