Was Wang Long in Nanjing a mass grave before?

No, Longwangshan Park is built on Longwangshan. The predecessor of the park is Longwangshan Forest Farm. In the early years, it was the experimental forest farm of the scientific laboratory of the Ministry of Reclamation of the National Government. Established in 1929. At that time, there were forest nurseries, fire barriers, fire watchtowers and forest police. By the early days of liberation, all greening was completed. Wang Longshan is located in Pukou District, Nanjing, and belongs to the remnant vein of Laoshan Mountain. It is named after the shape of Wolong Mountain. Covering an area of nearly 2000 mu, the main peak is114m above sea level.