He has just observed that the basic structure of the explosive bags of these four vehicles is the same. They all rely on wires to ignite propellant to detonate. This is a very traditional kind of explosive, which can be successfully removed by cutting the red or blue lines just as in the TV. Four explosives are the same, which means that only one line needs to be guessed correctly, and all the remaining lines are solved.

Red and blue lights flashed alternately, reflecting Zhao Tiezhu's face. Beans of sweat dripped slowly from his forehead and went down the dents on his nose and corners of his eyes. But because...