A nuclear-powered Type 094A Jin-class ballistic missile submarine of the Chinese People’s Liberation Army (PLA) Navy is seen during a military display in the South China Sea April 12, 2018. Picture taken April 12, 2018. To match Special Report CHINA-ARMY/NUCLEAR REUTERS/Stringer ATTENTION EDITORS – THIS IMAGE WAS PROVIDED BY A THIRD PARTY. CHINA OUT. – RC18C69C4570