The other day an Iranian top nuclear expert was assassinated right on the street of Tehran.  Well, the first reaction when I heard of the news was why those VIPs had not lived incognito and been consigned themselves to oblivion, for the sake of national security. 

Please see the following report regarding the extreme close confidentiality measures that China Mainland exerted in protecting her top scientists. 

https://www.toutiao.com/a6901108879099200007/