Seven decades after its founding, the Chinese Navy put on a show Tuesday of the numerous strides it has made to become a "world-class" force to be reckoned — a shift that has unnerved some regional countries and the United States.

The Chinese People's Liberation Army Navy marked its 70th anniversary with an international fleet review and a massive naval parade, moves that could be seen as muscle-flexing by a resurgent China.

But President Xi Jinping looked to assuage fears of a rising China, saying his country would work hand-in-hand with both friends and rivals alike.