Her design is based on that of the German Type 209 submarine.

In December 2007 the first Type 094 submarine was moved to Sanya.

The experience gained from the two recommissioned submarines led to the construction of the Type 206 submarine, which was in use until 2011.

The German government placed an initial order of four Type 212A submarines in 1998.

Also a new nuclear attack submarine is under development, the Type 095 submarine.

The CY-1 is also known to have been tested on the Type 039 submarine.

In 1922-23 France ordered the Requin class, a Type 1 submarine.

In 2005 the first example of the Type 212 submarine, which is powered underwater by fuel cells, went into service with the German navy.

The Romeo was also copied in China as the Type 033 submarine.

As of 2011 they were reported to be 1,200-ton Type 209 submarines.