Visitors walk in front of PLA Navy supply ship Gaoyouhu at Port of Antwerp, Belgium, Sept. 17, 2017. China's 26th convoy fleet to gulf of Aden and Somali waters arrived here on Sept. 14 for a five-day friendly visit, marking the first time for a Chinese navy formation to visit Belgium.
A four-vessel Chinese naval fleet arrives at a naval port in Russia's Vladivostok on Sept. 18, 2017. The second stage of the China-Russia Joint Sea - 2017 military exercise is scheduled to be held in Vladivostok from September 18 to 26, 2017.
Pilots assigned to an army aviation brigade of the PLA Army's 80th Combined Corps hover their attack helicopters before leaving for missions during a night flight training exercise on September 15, 2017.
Soldiers attached to a PLA army unit mount an UAV onto its launching catapult for a reconnaissance flight during the Firepower-2017 Qingtongxia exercise at a military training range in northwest China on Sept. 16, 2017.
People attend a ceremony to mark the 86th anniversary of the "September 18 Incident" at the September 18 Incident History Museum in Shenyang, capital of northeast China's Liaoning Province, Sept. 18, 2017.
The guided-missile frigate Daqing navigates in waters of the Japan Sea on September 16, 2017. A four-vessel Chinese naval fleet is en route to Russia's Vladivostok to take part in the second stage of the China-Russia Joint Sea - 2017 military exercise.
A Type-63 Tracked Armored Vehicle attached to a brigade of the PLA 77th Group Army wades through a mud puddle during a tactical driving skills training exercise on September 13, 2017.
A pilot assigned to an aviation brigade of the air force under the PLA Southern Theater Command lowers the canopy on a J-10B fighter jet prior to a round-the-clock flight training exercise on September 11, 2017.
Towed howitzer systems attached to an army brigade with the PLA 73rd Group Army fire a salvo of 122mm shells at simulated targets during a live-fire training exercise on September 13, 2017.
China's Fenglei aerobatic team performs at the opening ceremony of the 4th China International Helicopter Expo in Tianjin, north China, on Sept. 14, 2017. The expo kicked off here on Thursday.