cartoon character "xiaxia" standing on a yangtze river cruise ship deck, background with misty kuimen gorge and green mountains. character details: kuimen headdress, wavy ears, gradient blue eyes, river blue shirt with green belt. holding a small flag printed with "sanxia" in right hand, left hand making ok gesture. flat illustration style, modern cartoon, bright color palette (river blue #00a8e8, red sandstone #ff4848, forest green #00c851), soft fog effect, simple background elements, 8k high definition, warm light,