photo1¡GThe honor guards of the Chinese People's Liberation Army (PLA) Navy stand in formation before a naval parade staged to mark the 70th founding anniversary of the PLA Navy at a pier in Qingdao, east China's Shandong Province, on April 23, 2019. (Xinhua/Li Gang)

photo2¡GThe honor guards of the Chinese People's Liberation Army (PLA) Navy stand in formation before a naval parade staged to mark the 70th founding anniversary of the PLA Navy at a pier in Qingdao, east China's Shandong Province, on April 23, 2019. (Xinhua/Li Gang)

photo3¡GA new type of nuclear submarine of the Chinese People's Liberation Army (PLA) Navy is reviewed during a naval parade staged to mark the 70th founding anniversary of the PLA Navy on the sea off Qingdao, east China's Shandong Province, on April 23, 2019. (Xinhua/Li Ziheng)