Liu Guodong took out his phone and played the audio of Wang Guojun making the ransom call.
"Is this the audio of Wang Guojun making the ransom call? Is there any problem?"
Ren Qiang was present at the time and was naturally familiar with the audio.
"We conducted a voiceprint analysis of the audio today, and Lu Chuan found the sound of a fire alarm in the background when Liu Bai was speaking."
"Also, Wang Guojun mentioned 'a long journey' during the call..."
Liu Guodong briefly explained the general process.
"So, we think the fire stations near West Mountain County, the North Suburb of the High-speed Rail New District, Wujia County, and Yantou River New District could be key areas to investigate."
"West Mountain County, the North Suburb of the High-speed Rail New District, Wujia County, and Yantou River New District."
Hearing these place names, Qin Yong looked at Ren Qiang: "Did you just mention that house at Erpi's?"
"It's in Yantou River New District."
