Participants attend the "Exercise Cormorant Strike X-2019" in Kuchchveli, Sri Lanka, on Sept. 23, 2019. The "Exercise Cormorant Strike X-2019" organized by the Sri Lanka Army was concluded on Monday. (Photo: Gayan Sameera/Xinhua)

Participants attend the "Exercise Cormorant Strike X-2019" in Kuchchveli, Sri Lanka, on Sept. 23, 2019. The "Exercise Cormorant Strike X-2019" organized by the Sri Lanka Army was concluded on Monday. (Photo: Gayan Sameera/Xinhua)

Participants attend the "Exercise Cormorant Strike X-2019" in Kuchchveli, Sri Lanka, on Sept. 23, 2019. The "Exercise Cormorant Strike X-2019" organized by the Sri Lanka Army was concluded on Monday. (Photo: Gayan Sameera/Xinhua)

Participants attend the "Exercise Cormorant Strike X-2019" in Kuchchveli, Sri Lanka, on Sept. 23, 2019. The "Exercise Cormorant Strike X-2019" organized by the Sri Lanka Army was concluded on Monday. (Photo: Gayan Sameera/Xinhua)

A military helicopter is seen during the "Exercise Cormorant Strike X-2019" in Kuchchveli, Sri Lanka, on Sept. 23, 2019. The "Exercise Cormorant Strike X-2019" organized by the Sri Lanka Army was concluded on Monday. (Photo: Gayan Sameera/Xinhua)

Participants attend the "Exercise Cormorant Strike X-2019" in Kuchchveli, Sri Lanka, on Sept. 23, 2019. The "Exercise Cormorant Strike X-2019" organized by the Sri Lanka Army was concluded on Monday. (Photo: Gayan Sameera/Xinhua)