sentences:  The specimen (which may be a distinct species "R. leloii") located in Hoan Kiem Lake, in Hanoi is thought to be the legendary "Kim Qui" (金龜), or Golden Turtle God, who has appeared at opportune moments throughout Vietnamese history.The golden turtle first appeared during the reign of King An Dương Vương (257-207 BC) and assisted the king in the construction of defenses for the ancient capital of Co Loa.When Co Loa was attacked, Kim Qui assisted the king in making a magical cross-bow that massively rained arrows upon the invaders in only a single shot.