Not necessarily safe. There was a case in which Zhao, a staff member of an agency, took photos and scanned confidential documents for convenience, and uploaded them to WeChat's graphic recognition applet, turning the pictures into text output. He thought it was safe not to send confidential documents to others, but his behavior led to the uploading of confidential information to the Internet, endangering the security of state secrets. After the incident, Zhao was punished accordingly. So be careful when using it.