Vietnamese fisherman Nguyen Van Loc has been attacked by Chinese coast guard vessels so many times, he has lost count.<br />One summer day in 2020, while sailing through the Paracel Islands -- resource-rich waters in the South China Sea claimed by both Hanoi and Beijing -- his boat was rammed by a Chinese ship repeatedly until it capsized.<br />Thirteen of his crewmen were left clinging to a fishing basket in the water, desperately awaiting help.