The burglary code, after media reports, although not necessarily true in hong kong, but we believe that a similar Methods to test the burglary target, so recap anyway.

In the UK, had reported this news：

CID officers in Torbay said they had tweeted examples of symbols after some had been reported in Exeter.

The symbols could inform burglars about a property, its occupants and their possessions, officers said.

Source：

hk.apple.nextmedia.com

www.dailymail.co.uk