China and Pakistan launch a joint naval exercise in Karachi, Pakistan, Jan 6, 2020. [Photo/Xinhua]

The nine-day "Sea Guardians 2020" exercise consists of two sessions: joint training in Karachi and live-fire drills in northern parts of the Arabian Sea. [Photo/Xinhua]

China sends four ships from the naval force of the PLA Southern Theater Command. [Photo/Xinhua]

Pakistani children present flowers to members of the PLA Navy's Marine Corps in Karachi, Pakistan, Jan 6, 2020. [Photo/Xinhua]