On the fourth day, explore the Shenyang Forbidden City, a smaller-scale replica of the Forbidden City in Beijing. Admire the beautiful courtyards, ancient buildings, and learn about the history of the palace complex. Afterward, visit Marshal Zhang's Mansion, the former residence of Zhang Zuolin, a prominent warlord during the early 20th century. Explore the mansion's opulent halls, gardens, and gain a deeper understanding of the turbulent times in Chinese history.