River Bottom

Jiangcheng City, Qingjiang River passes through the city. Zhang Zhengdong has been a criminal policeman for twelve years, and he never thought that he would return to the textile factory in this way - the old chimney of the boiler room was to be demolished, and his father, Zhang Jianguo, had guarded the boiler here for twelve years. In 2006, Zhang Jianguo discovered a passage that should not exist 17 meters underground in the third workshop of the textile factory. There are eleven liquid nitrogen containers sealed in the channel, each container corresponds to a "work-injured" worker. Their injury records were stamped, numbered, filed, and then sunk to the bottom of the river—waiting for a heavy rain, the water level of the Qingjiang River crossed the warning line, the water well opened automatically, and all evidence disappeared. Zhang Jianguo spent seven days to find out all 11 fake agreements, an underground passage, and the entire trace eradication mechanism, then sealed the evidence into four letters and died in the boiler room duty room.