PLEASE RETUREN US THE ARMOURED VEHICLE. 请还给我们装甲车

Probably it is a case of Reminder of Some Old Agreement.
The New Official may not aware of this historic agreement.
Seems risky to have some military ties with Taiwan,  So Sensitive.

Guess Mainland Chinese are Sensible and Culture.
Just need some Reminder and the Magic Word PLEASE.

PLEASE RETUREN US THE ARMOURED VEHICLE.

请还给我们装甲车