China is aiming to boost its “hunt-and-kill” capabilities with a new submarine that boasts futuristic features, according to Chinese analysts.A submarine that appeared to lack a traditional fin was being built at the Jiangnan Shipyard in Shanghai, France-based Naval News reported on Wednesday, citing Vantor satellite images dated June 1.A submarine’s fin is a tower on its topside, usually used for observation and communications. Analysts said a finless design could boost the craft’s stealth,...