Outside the Palace of Heavenly Purity.
Emperor Chongzhen had Wang Chengen nail a few books onto a wooden post. Once secured, he instructed Li Ruolian: "Find a matchlock bird gun and a fire musket."
Once Li Ruolian was prepared, under the watchful eyes of Li Banghua and Fan Jingwen, the Emperor ignited the fuse and fired at the post fifty paces away.
Chapter 67