[lloyds_barclays]

Just my personal experience.

One of my family members who lived in China was involved in a Ponzi fraud couple years ago. They told me that when they entered the interrogation room, officers had already printed out their WeChat chatting history, even before they handed out their phone.

[okasaki]

Well there's (at least) two people involved in a chat. They could have just gotten it from the other person.

[giancarlostoro]

I read it as their entire chat history.