Chinese and Russian warships began six-day joint naval exercises Sunday in the Yellow Sea, China's state-run Xinhua News Agency reported. "The exercises will involve several simulated missions, including the rescue of a hijacked ship, the escort of a commercial vessel and the defense (of) a convoy from air and sea attacks," a Russian defense ministry spokesman said Friday, according to Russia's RIA Novosti news agency. The war game will include 16 Chinese vessels and two submarines, as well as 13 aircraft and five shipboard helicopters, Xinhua said. The agency said four Russian warships and three Russian supply ships arrived Saturday. More than 4,000 Chinese service members will attend the exercises, Xinhua said, citing navy sources.