Beijing is expanding police powers over the internet and personal data, and Taiwan's ruling party is warning its citizens that traveling to China now carries real personal and data risk.

• China's Ministry of Public Security published new rules letting police inspect internet operators, data handling, and personal information, taking effect October 1.
• Taiwan's ruling DPP is urging people to think hard before traveling to China and to strip phones, laptops, and work files of sensitive material first.
• The rules are the latest step in a decade-long push, since Xi Jinping's 2014 "overall national security" doctrine, to stretch national security into everyday life.
• Taipei says Beijing's legal campaign has shifted from punishing Taiwan independence to building a legal excuse for forced unification, including cross-border arrests.
• Chinese law is criticized as vaguely written and politically driven, so enforcement can be unpredictable for visitors.

Outlook: Expect tighter checks on travelers and their devices once the rules kick in on October 1, and more warnings from Taipei.