Neon Tower Introduction: The water mist formed by the repeated impact of Hukou Waterfall rises into the air, refracting sunlight to form a rainbow. Sometimes the rainbow is arc-shaped and inserted into the water from the sky, like a long dragon sucking water. Sometimes it is a straight ribbon lying across the water, like a flying bridge. Sometimes it appears in the thick smoke and fog, like clusters of flowers, colorful, erratic and confusing. Neon water play is the product of the interaction between "underwater smoke" and sunlight.