My father said that Hoan Kiem Lake is a gem in the heart of Hanoi. A thousand years have passed, the lake water is still emerald green. Standing on a high-rise building looking down, Sword Lake looks like an oval mirror reflecting the sky, clouds and trees along the shore. I don't know if the words "Thuan Thien" on the treasured sword of the old Le king are still intact, only seeing the ancient Turtle Tower still lying dormant on the mound covered with green grass in the middle of the lake. Waves rippled in rows as if making the clock bells on the Hanoi Post Office building radiate farther on the lake. To the north, The Huc Son Bridge leading the entrance to Ngoc Son Temple is filled with incense. At the two ends of the bridge, the low branches of the trees covered the railing with leaves.