Chinese sailors and officers onboard the Chinese frigate Huangshan during the KAKADU 2018 Exercises off the coast of Darwin, Australia, September 7, 2018. Live fire and aerial defense exercises took place on Friday, with Chinese sailors being lauded for their professionalism by other participants involved in the joint naval exercise. [Photo: China Plus/Xu Guang]

Chinese sailors and officers onboard the Chinese frigate Huangshan during the KAKADU 2018 Exercises off the coast of Darwin, Australia, September 7, 2018. Live fire and aerial defense exercises took place on Friday, with Chinese sailors being lauded for their professionalism by other participants involved in the joint naval exercise. [Photo: China Plus/Xu Guang]

Chinese sailors and officers onboard the Chinese frigate Huangshan during the KAKADU 2018 Exercises off the coast of Darwin, Australia, September 7, 2018. Live fire and aerial defense exercises took place on Friday, with Chinese sailors being lauded for their professionalism by other participants involved in the joint naval exercise. [Photo: China Plus/Xu Guang]

Chinese sailors and officers onboard the Chinese frigate Huangshan during the KAKADU 2018 Exercises off the coast of Darwin, Australia, September 7, 2018. Live fire and aerial defense exercises took place on Friday, with Chinese sailors being lauded for their professionalism by other participants involved in the joint naval exercise. [Photo: China Plus/Xu Guang]

Chinese sailors and officers onboard the Chinese frigate Huangshan during the KAKADU 2018 Exercises off the coast of Darwin, Australia, September 7, 2018. Live fire and aerial defense exercises took place on Friday, with Chinese sailors being lauded for their professionalism by other participants involved in the joint naval exercise. [Photo: China Plus/Xu Guang]