All Iknow is if you have Blietooth enabled on your phone you should be worried about exploits and from mch closer than China.
Everything else is of secondary consideration. If not it should be.
BlueBorne Vulnerabilities Impact Amazon Echo and Google Home
'Armis Labs revealed a new attack vector endangering major mobile, desktop, and IoT operating systems, including Android, iOS, Windows, and Linux, and the devices using them. The new vector is dubbed “BlueBorne,” as it can spread through the air (airborne) and attack devices via Bluetooth. Armis has also disclosed eight related zero-day vulnerabilities, four of which are classified as critical. BlueBorne allows attackers to take control of devices, access corporate data and networks, penetrate secure “air-gapped” networks, and spread malware laterally to adjacent devices. Armis reported these vulnerabilities to the responsible actors, and is working with them as patches are being identified and released."
https://www.armis.com/research/blueborne/
Google is your friend. Not everyone within 50 feet is and you don't know what they know about you already.
Idle hands and all that they do quietly while patiently waiting a mystery.
But might look something like this running on one of many laptops and you can't understand why so many to look at Facebook...