明史
The official compiling of "History of Ming" started on May 2 in the second year of Shunzhi Emperor. At that time, which is the early years that the Qing first entered and hosted the Central Plain. With the obvious purpose of compiling the "History of Ming", the Qing dynasty intended to declare the collapse of Ming, however, the court of Hongguang (founded by the Ming imperial clan) with capital of Nanjing was antagonistic to the Qing, and the compiling of "History of Ming" was the announcement of inexistence of Hongguang Court.