Prompt: A depiction of the scene 'An old friend bids farewell at Yellow Crane Tower' from Li Bai's poem, in the style of Li Gonglin. The artwork should show the majestic Yellow Crane Tower, with Li Bai and Meng Haoran standing on the tower, their expressions tinged with melancholy yet graceful. The tower should be elegantly depicted, with distant mountains and a serene environment surrounding it. The style should mimic Li Gonglin's, featuring delicate lines, subtle colors, and an emphasis on the tranquil and profound atmosphere.