Generate a Dragon Boat Festival poster with dark green rice dumpling leaves and a dragon boat in the background. The dragon boat is painted with bright dragon scales and flowing ribbons. In the center of the poster is a figure wearing traditional Hanfu, holding a fragrant rice dumpling tightly wrapped in colorful silk threads. Behind the characters is a lush rice dumpling tree, covered with colorful rice dumplings. The entire poster uses red and yellow as the main colors, creating a happy and peaceful atmosphere of the Dragon Boat Festival.