Short answer
This answer explains how does important data change china cybersecurity obligations? in practical terms: the trigger to check, the evidence to keep, and the follow-up decision that should be owned before launch or change approval.
The practical file is an important-data screening note with data category, business use, potential harm, storage/export path, owner, and escalation decision.
Use for data classification and graded protection, important-data risk assessment, security management, incident response, outbound important-data context, penalties, and 1 September 2021 effective date.
Use for data export security assessment triggers, self-assessment, application materials, review timing, re-review, validity, and re-application triggers.