While they were talking, the two of them walked into Li Linghai's secret meeting room.
The meeting room used to be the center of the national museum where the damaged antiques were repaired. Many extremely fragile antiques had harsh requirements for temperature, humidity, and pressure when they were being repaired. Therefore, the repair center was surrounded by highly-keen sensors, which could also serve for the purpose of anti-monitoring after modifications.
Or maybe it was because Queen Li Linghai felt particularly great about herself when she discussed the cause to "renew the Imperium" under Blackstar the Great's broken statue that needed fixing badly.