章 455: Chapter 419: This Will Remains Unchanged

Position control is a very traditional investigative method. Its feature is that it is quite costly, but the effects are significant.

Take the current hotel industry, for instance, where everyone needs an ID card to check into a room. This is a form of position control within the hotel industry. Through this method, the mobility of various criminal suspects is constrained, especially for those committing crimes on the run or involved in collective gambling and drug use, which becomes relatively difficult.

Of course, in some places, the hotel industry's requirement for ID cards is not strict enough, allowing an individual to check into a room alone, or even letting the owner check in on behalf of the guest. This means the position is not well controlled.