China's conventional submarines to secretly develop new questions than answers to give Russian industry experts believe that China "Yuan" class conventional submarines is actually a Russian 877EKM/636 type (China Code 039A or 041-type) imitation of conventional submarines, but in manipulating the rudder and the superstructure on the layout of some components change . "Jane's Defense Weekly," said China's new conventional submarines with AIP power plant may be used in embedded compartment. Russian experts have speculated that, since China and Sweden maintained a close technical cooperation, the new AIP submarine power plant may be developed by the Swedish Stirling engine. Sweden may have been manufactured according to Chinese order this engine compartment.

Russia suspended the production of larger size tank, whether it is 877EKM/636-type diesel-electric submarines, or the new 677-type submarines, do not apply. "Jane's Defense Weekly" that China's new conventional submarine cabin guard was unusually large, about 5-6 meters and a width of 3.7 to 4 meters. But Russian experts point out that this size is actually not particularly large, and 877EKM/636-type diesel-electric submarines are basically the same compartment.

May 2011 shooting in mid-submarine in dry dock pictures show that China's new conventional submarine hull size as the larger, and the compartment below the hull and shield conventional submarines similar to the early Soviet Union.

China has long been the help of the French Society of the development of anti-ship missile torpedo size will not be repeated after the Soviet Union and Russia, the anti-ship missiles or submarine-launched intercontinental ballistic missile configured individually to the cabin and superstructure on the idea. China's new submarine compartment large size, may explain the increase in mobile devices equipped with, including independent research and development in China can receive the information space navigation system signal receiving system.

"Dongfeng -21" missile has been serving in the PLA Second Artillery Corps, it can receive space, air and ground sensors combined radar guidance system optical signal that can maneuver in flight through a series of rapid deceleration of the end, which is the use of cluster warhead on carrier class high-precision surface targets needed to combat.

The Soviet Union had the early 80s of last century, "Sailing - Dolphin" project had developed within the framework of anti-ship missiles carrying cluster 4-6 missile missiles, but later discovered that the self-guided anti-ship missiles of any head of about Mach 7-10 speed dive from space can not be locked when the aircraft carrier goal, eventually abandoned the project. Naturally, the Chinese Navy in the development of their own may not repeat the mistakes of the failure of the Soviet Navy.