It is recommended to spend 3-4 days visiting Nanjing: Day 1: Dr. Sun Yat-sen's Mausoleum, Ming Xiaoling Mausoleum, and Music Stand (a full day in Zhongshan Scenic Area). Day 2: Confucius Temple, Qinhuai River night views, and Laomendong Historic District (experience ancient urban culture). Day 3: Presidential Palace, Nanjing Museum, and Xuanwu Lake (blend of history and nature). Day 4: Niushoushan Cultural Tourism Zone (explore the Buddhist sanctuary). The metro covers core attractions, offering a compact itinerary for deep exploration of the ancient capital’s charm.