Did Louis Koo play The Lost Bullet?

During the period of the Republic of China, a bizarre murder case occurred in the largest arsenal in China. The deceased was killed by "ghost bullets"-no bullets were found at the crime scene. For a time, doubts kept gathering and people were worried. This case is called the first mystery in the Republic of China. The case was investigated by Song Donglu (Liu Qingyun), a government policeman in charge of file management in the police station. As a civilian, Song Donglu is meticulous and has a unique solution to difficult and complicated cases. Guo Zhui (Nicholas Tse), a hot-blooded detective who is bent on doing harm to the people, can't tolerate the corrupt atmosphere in the police station, and joins hands with Song Dong Road to investigate this bizarre murder case. How to shoot without bullets? How to make the bullet disappear after penetrating into the body? Song Dong Road and Guo Zhui made various researches on guns and bullets, including firing salt bullets and ice bullets at pigs, but there was no satisfactory result. With the in-depth investigation of the case, the two detectives discovered the gruesome murder chamber and the bizarre bomb-making device, which stunned the experienced Song Dong Road. Just when the truth of "Ghost Bullet Killing" came out, Song Dong Road and Guo Zhui were pursued one after another, and the policeman Xiaowu (Jing Bo Ran) was shot and killed while covering Song Dong Road and Guo Zhui's escape. The deadline for closing the case is imminent, and the fortune-telling girl Xiao Yulak (Yang Mi) inadvertently reveals the shocking secret of the "ghost bullet"