![Visitors view the guided-missile destroyer Guiyang of the Chinese People\'s Liberation Army (PLA) Navy during a warship open day event in Qingdao, east China\'s Shandong Province, April 24, 2019. A warship open day event was held on Wednesday in Qingdao, as part the multinational naval events marking the 70th founding anniversary of PLA Navy. (Xinhua/Guo Xulei)](http://www.ecns.cn/hd/2019/04/25/29c37cee72074c638d41221c9e8b7330.jpg)
Visitors view the guided-missile destroyer Guiyang of the Chinese People's Liberation Army (PLA) Navy during a warship open day event in Qingdao, east China's Shandong Province, April 24, 2019. A warship open day event was held on Wednesday in Qingdao, as part the multinational naval events marking the 70th founding anniversary of PLA Navy. (Xinhua/Guo Xulei)
![Crew members and visitors take a selfie on Russian Navy tug ship Nikolai Chiker during a warship open day event in Qingdao, east China\'s Shandong Province, April 24, 2019. A warship open day event was held on Wednesday in Qingdao, as part the multinational naval events marking the 70th founding anniversary of PLA Navy. (Xinhua/Yu Lan)](http://www.ecns.cn/hd/2019/04/25/bade5d801c354973ba0c02f781aa84eb.jpg)
Crew members and visitors take a selfie on Russian Navy tug ship Nikolai Chiker during a warship open day event in Qingdao, east China's Shandong Province, April 24, 2019. A warship open day event was held on Wednesday in Qingdao, as part the multinational naval events marking the 70th founding anniversary of PLA Navy. (Xinhua/Yu Lan)
![Visitors are seen on Royal Thai Navy frigate HTMS Bangpakong during a warship open day event in Qingdao, east China\'s Shandong Province, April 24, 2019. A warship open day event was held on Wednesday in Qingdao, as part the multinational naval events marking the 70th founding anniversary of PLA Navy. (Xinhua/Guo Xulei)](http://www.ecns.cn/hd/2019/04/25/3cb94ae86f2144b09a8b096b393d1c9a.jpg)
Visitors are seen on Royal Thai Navy frigate HTMS Bangpakong during a warship open day event in Qingdao, east China's Shandong Province, April 24, 2019. A warship open day event was held on Wednesday in Qingdao, as part the multinational naval events marking the 70th founding anniversary of PLA Navy. (Xinhua/Guo Xulei)
![A Thai frogman jumps into water during a warship open day event in Qingdao, east China\'s Shandong Province, April 24, 2019. A warship open day event was held on Wednesday in Qingdao, as part the multinational naval events marking the 70th founding anniversary of PLA Navy. (Xinhua/Wang Yuguo)](http://www.ecns.cn/hd/2019/04/25/9ec37f6c287a484c8a458e1c7c2520d5.jpg)
A Thai frogman jumps into water during a warship open day event in Qingdao, east China's Shandong Province, April 24, 2019. A warship open day event was held on Wednesday in Qingdao, as part the multinational naval events marking the 70th founding anniversary of PLA Navy. (Xinhua/Wang Yuguo)
![Visitors stand on guided-missile destroyer Guiyang of the Chinese People\'s Liberation Army (PLA) Navy during a warship open day event in Qingdao, east China\'s Shandong Province, April 24, 2019. A warship open day event was held on Wednesday in Qingdao, as part the multinational naval events marking the 70th founding anniversary of PLA Navy. (Xinhua/Wang Yuguo)](http://www.ecns.cn/hd/2019/04/25/cca2dffa8eca4b9099d6fe64f1aef1e0.jpg)
Visitors stand on guided-missile destroyer Guiyang of the Chinese People's Liberation Army (PLA) Navy during a warship open day event in Qingdao, east China's Shandong Province, April 24, 2019. A warship open day event was held on Wednesday in Qingdao, as part the multinational naval events marking the 70th founding anniversary of PLA Navy. (Xinhua/Wang Yuguo)
![Visitors purchase souvenirs on Royal Thai Navy frigate HTMS Bangpakong during a warship open day event in Qingdao, east China\'s Shandong Province, April 24, 2019. A warship open day event was held on Wednesday in Qingdao, as part the multinational naval events marking the 70th founding anniversary of PLA Navy. (Xinhua/Wang Yuguo)](http://www.ecns.cn/hd/2019/04/25/84b25a321ffd4ae9ad54f90e118a3679.jpg)
Visitors purchase souvenirs on Royal Thai Navy frigate HTMS Bangpakong during a warship open day event in Qingdao, east China's Shandong Province, April 24, 2019. A warship open day event was held on Wednesday in Qingdao, as part the multinational naval events marking the 70th founding anniversary of PLA Navy. (Xinhua/Wang Yuguo)
![Visitors view Royal Thai Navy frigate HTMS Bangpakong during a warship open day event in Qingdao, east China\'s Shandong Province, April 24, 2019. A warship open day event was held on Wednesday in Qingdao, as part the multinational naval events marking the 70th founding anniversary of PLA Navy. (Xinhua/Guo Xulei)](http://www.ecns.cn/hd/2019/04/25/f77d6031429f46e3a852270590e01136.jpg)
Visitors view Royal Thai Navy frigate HTMS Bangpakong during a warship open day event in Qingdao, east China's Shandong Province, April 24, 2019. A warship open day event was held on Wednesday in Qingdao, as part the multinational naval events marking the 70th founding anniversary of PLA Navy. (Xinhua/Guo Xulei)
![Visitors pose for a photo in front of hospital ship Peace Ark of the Chinese People\'s Liberation Army (PLA) Navy during a warship open day event in Qingdao, east China\'s Shandong Province, April 24, 2019. A warship open day event was held on Wednesday in Qingdao, as part the multinational naval events marking the 70th founding anniversary of PLA Navy. (Xinhua/Ma Jing)](http://www.ecns.cn/hd/2019/04/25/eeb793a200dd40ecb5865659b98dfa56.jpg)
Visitors pose for a photo in front of hospital ship Peace Ark of the Chinese People's Liberation Army (PLA) Navy during a warship open day event in Qingdao, east China's Shandong Province, April 24, 2019. A warship open day event was held on Wednesday in Qingdao, as part the multinational naval events marking the 70th founding anniversary of PLA Navy. (Xinhua/Ma Jing)
![Visitors view the guided-missile destroyer Guiyang of the Chinese People\'s Liberation Army (PLA) Navy during a warship open day event in Qingdao, east China\'s Shandong Province, April 24, 2019. A warship open day event was held on Wednesday in Qingdao, as part the multinational naval events marking the 70th founding anniversary of PLA Navy. (Xinhua/Qian Yi)](http://www.ecns.cn/hd/2019/04/25/72fd177a68a04cfaa2a9025f33e11919.jpg)
Visitors view the guided-missile destroyer Guiyang of the Chinese People's Liberation Army (PLA) Navy during a warship open day event in Qingdao, east China's Shandong Province, April 24, 2019. A warship open day event was held on Wednesday in Qingdao, as part the multinational naval events marking the 70th founding anniversary of PLA Navy. (Xinhua/Qian Yi)
![Visitors take photos during a warship open day event in Qingdao, east China\'s Shandong Province, April 24, 2019. A warship open day event was held on Wednesday in Qingdao, as part the multinational naval events marking the 70th founding anniversary of PLA Navy. (Xinhua/Luo Xiaoguang)](http://www.ecns.cn/hd/2019/04/25/ddd025b175224eb78a11dcb17dfaa9e9.jpg)
Visitors take photos during a warship open day event in Qingdao, east China's Shandong Province, April 24, 2019. A warship open day event was held on Wednesday in Qingdao, as part the multinational naval events marking the 70th founding anniversary of PLA Navy. (Xinhua/Luo Xiaoguang)
![Visitors are seen during a warship open day event in Qingdao, east China\'s Shandong Province, April 24, 2019. A warship open day event was held on Wednesday in Qingdao, as part the multinational naval events marking the 70th founding anniversary of PLA Navy. (Xinhua/Ma Jing)](http://www.ecns.cn/hd/2019/04/25/093c4a21f77c4d5c8fd5b07917260bc6.jpg)
Visitors are seen during a warship open day event in Qingdao, east China's Shandong Province, April 24, 2019. A warship open day event was held on Wednesday in Qingdao, as part the multinational naval events marking the 70th founding anniversary of PLA Navy. (Xinhua/Ma Jing)
![A crew member introduces torpedo installations to visitors on the guided-missile destroyer Guiyang of the Chinese People\'s Liberation Army (PLA) Navy during a warship open day event in Qingdao, east China\'s Shandong Province, April 24, 2019. A warship open day event was held on Wednesday in Qingdao, as part the multinational naval events marking the 70th founding anniversary of PLA Navy. (Xinhua/Yu Lan)](http://www.ecns.cn/hd/2019/04/25/8d552c7fda5c4eff9a192809f963d50e.jpg)
A crew member introduces torpedo installations to visitors on the guided-missile destroyer Guiyang of the Chinese People's Liberation Army (PLA) Navy during a warship open day event in Qingdao, east China's Shandong Province, April 24, 2019. A warship open day event was held on Wednesday in Qingdao, as part the multinational naval events marking the 70th founding anniversary of PLA Navy. (Xinhua/Yu Lan)
![Visitors prepare to board guided-missile destroyer Guiyang of the Chinese People\'s Liberation Army (PLA) Navy during a warship open day event in Qingdao, east China\'s Shandong Province, April 24, 2019. A warship open day event was held on Wednesday in Qingdao, as part the multinational naval events marking the 70th founding anniversary of PLA Navy. (Xinhua/Ma Jing)](http://www.ecns.cn/hd/2019/04/25/1ecbf6b216264ad29a346c42dab0891a.jpg)
Visitors prepare to board guided-missile destroyer Guiyang of the Chinese People's Liberation Army (PLA) Navy during a warship open day event in Qingdao, east China's Shandong Province, April 24, 2019. A warship open day event was held on Wednesday in Qingdao, as part the multinational naval events marking the 70th founding anniversary of PLA Navy. (Xinhua/Ma Jing)
![Visitors view hospital ship Peace Ark of the Chinese People\'s Liberation Army (PLA) Navy during a warship open day event in Qingdao, east China\'s Shandong Province, April 24, 2019. A warship open day event was held on Wednesday in Qingdao, as part the multinational naval events marking the 70th founding anniversary of PLA Navy. (Xinhua/Guo Xulei)](http://www.ecns.cn/hd/2019/04/25/df883d6ae9a0433e9f794a39a2cd66c0.jpg)
Visitors view hospital ship Peace Ark of the Chinese People's Liberation Army (PLA) Navy during a warship open day event in Qingdao, east China's Shandong Province, April 24, 2019. A warship open day event was held on Wednesday in Qingdao, as part the multinational naval events marking the 70th founding anniversary of PLA Navy. (Xinhua/Guo Xulei)
![Visitors take photos of the guided-missile destroyer Guiyang of the Chinese People\'s Liberation Army (PLA) Navy during a warship open day event in Qingdao, east China\'s Shandong Province, April 24, 2019. A warship open day event was held on Wednesday in Qingdao, as part the multinational naval events marking the 70th founding anniversary of PLA Navy. (Xinhua/Wang Siwei)](http://www.ecns.cn/hd/2019/04/25/6dd3a5318ea846cbbfea544493cadebf.jpg)
Visitors take photos of the guided-missile destroyer Guiyang of the Chinese People's Liberation Army (PLA) Navy during a warship open day event in Qingdao, east China's Shandong Province, April 24, 2019. A warship open day event was held on Wednesday in Qingdao, as part the multinational naval events marking the 70th founding anniversary of PLA Navy. (Xinhua/Wang Siwei)
![Visitors view the landing vessel Jinggangshan of the Chinese People\'s Liberation Army (PLA) Navy during a warship open day event in Qingdao, east China\'s Shandong Province, April 24, 2019. A warship open day event was held on Wednesday in Qingdao, as part the multinational naval events marking the 70th founding anniversary of PLA Navy. (Xinhua/Guo Xulei)](http://www.ecns.cn/hd/2019/04/25/0b1971985c144c4f91f7aa15fb4cb944.jpg)
Visitors view the landing vessel Jinggangshan of the Chinese People's Liberation Army (PLA) Navy during a warship open day event in Qingdao, east China's Shandong Province, April 24, 2019. A warship open day event was held on Wednesday in Qingdao, as part the multinational naval events marking the 70th founding anniversary of PLA Navy. (Xinhua/Guo Xulei)
![An interpreter introduces the guided-missile destroyer Guiyang of the Chinese People\'s Liberation Army (PLA) Navy to visitors during a warship open day event in Qingdao, east China\'s Shandong Province, April 24, 2019. A warship open day event was held on Wednesday in Qingdao, as part the multinational naval events marking the 70th founding anniversary of PLA Navy. (Xinhua/Luo Xiaoguang)](http://www.ecns.cn/hd/2019/04/25/ca11a9cda84d4238863baa5ada5fc934.jpg)
An interpreter introduces the guided-missile destroyer Guiyang of the Chinese People's Liberation Army (PLA) Navy to visitors during a warship open day event in Qingdao, east China's Shandong Province, April 24, 2019. A warship open day event was held on Wednesday in Qingdao, as part the multinational naval events marking the 70th founding anniversary of PLA Navy. (Xinhua/Luo Xiaoguang)
![Visitors prepare to board on the guided-missile destroyer Guiyang of the Chinese People\'s Liberation Army (PLA) Navy during a warship open day event in Qingdao, east China\'s Shandong Province, April 24, 2019. A warship open day event was held on Wednesday in Qingdao, as part the multinational naval events marking the 70th founding anniversary of PLA Navy. (Xinhua/Luo Xiaoguang)](http://www.ecns.cn/hd/2019/04/25/a45392f065864dada808b5171a0427ca.jpg)
Visitors prepare to board on the guided-missile destroyer Guiyang of the Chinese People's Liberation Army (PLA) Navy during a warship open day event in Qingdao, east China's Shandong Province, April 24, 2019. A warship open day event was held on Wednesday in Qingdao, as part the multinational naval events marking the 70th founding anniversary of PLA Navy. (Xinhua/Luo Xiaoguang)
![Visitors are seen during a warship open day event in Qingdao, east China\'s Shandong Province, April 24, 2019. A warship open day event was held on Wednesday in Qingdao, as part the multinational naval events marking the 70th founding anniversary of PLA Navy. (Xinhua/Guo Xulei)](http://www.ecns.cn/hd/2019/04/25/21be71970d2c489ea768da2c31d3b1bd.jpg)
Visitors are seen during a warship open day event in Qingdao, east China's Shandong Province, April 24, 2019. A warship open day event was held on Wednesday in Qingdao, as part the multinational naval events marking the 70th founding anniversary of PLA Navy. (Xinhua/Guo Xulei)