The area of Xuanwu Lake in ancient times was larger than it is now, so it was often used as a training place for the navy. But in the Six Dynasties, Xuanwu Lake was designated as a royal garden and was no longer used as a training ground. Among them, after the establishment of Liu and Song Dynasties, Xuanwu Lake received much attention because of the establishment of Nanjing as the capital of the regime. In the early days of People's Republic of China (PRC), Liu Song also dredged Xuanwu Lake. Now, the three central islands of Xuanwu Lake, namely Liangzhou, Zhou Huan and Yingzhou, are formed by the accumulation of lake mud excavated during dredging. Later, the Southern Dynasties Qi, Liang and Chen Dou took Nanjing as their capital, so Xuanwu Lake has always existed as a royal garden.
But in the Sui and Tang Dynasties, because Nanjing was no longer the capital, Xuanwu Lake's status also declined, and it was once regarded as? Release pool? . Is Xuanwu Lake because of the imperial court in the Northern Song Dynasty? Abandon the lake and return it to the field? The promulgation of this policy was buried and then disappeared for more than 200 years. Later, it was not until the Yuan Dynasty that Xuanwu Lake was dredged twice. Reappearance? . After the Yuan Dynasty was replaced by the Ming Dynasty, the Ming Dynasty with Nanjing as its capital began to pay attention to Xuanwu Lake.
Xuanwu Lake was chosen as a place to store yellow books under the order of Zhu Yuanzhang, so the Ming court also established the Houhu Yellow Book Museum here. Xuanwu Lake has become a forbidden area because the pornographic books stored are very important materials. Xuanwu Lake is like this? Closed? It lasted more than 200 years, and it was not until Fengrunmen was built in the late Qing Dynasty that Xuanwu Lake began to transform into a public park.