Prompt: \"A poster depicting the Li Dong solar term in a traditional Southern Chinese style, featuring a river scene with a bamboo raft drifting slowly through emerald mountains covered in snow, an old man in a straw cape steering the raft with a long pole, wearing thick cotton-padded clothing to keep warm. Along the riverbanks are traditional Southern houses with tiled roofs covered in white snow, warm light glowing from inside. Pine and cypress trees with a dusting of snow line the riverbanks. The mood is tranquil and serene, capturing the essence of Li Dong's arrival in Southern China.\" Key points: Southern Chinese style River scene with bamboo raft Emerald green mountains with snow Old man steering raft in straw cape and padded clothes Traditional tiled houses along riverbanks Snow on pine and cypress trees Tranquil and serene mood Arrival of Li Dong in the south