The fingerprint identification battle has been a case-solving mechanism carried out by the police system for many years, aimed at breaking cold cases.
The exact starting time is beyond research, but this tradition has continued over the years.
From the ministries to the provincial departments and down to the city bureaus, fingerprint identification battles are organized more than once each year.
Beyond that down to district and county police departments, Criminal Investigation Teams, or technical appraisal centers, such battles are not held.
On one hand, at lower levels, there are fewer experts, and conducting a fingerprint identification battle would involve just a few people, making it no different from their regular work, thus naturally not becoming a battle.
On the other hand, the grassroots have limited resources, and they can't even solve normal cases, so naturally, less attention is given to cold cases.
