The Grand Floral Sea is the highlight of Phase IV of Hankou River Beach, covering 65,000 square m. It features a vibrant collection of flowers, including tall verbena, elegant zinnia, garden cosmos, purple loosestrife, and canna lilies. Divided by Erqi Binjiang Plaza, the upstream section showcases single-species flower fields complemented by clusters of large trees, while the downstream section highlights ornamental grasses. Winding pathways, boardwalks, and viewing platforms provide visitors with elevated vantage points to admire the stunning river, bridges, and floral landscapes.