Reporting in early April 2026 summarized claims that an actor exfiltrated on the order of ~10 petabytes from the National Supercomputing Center in Tianjin, with samples circulated publicly and analysts noting material that resembled high-performance computing and aerospace/defense-themed content. Major outlets stressed that the entire claimed volume could not be independently proven and that Beijing did not issue a Western-style breach confirmation.
Canonical record: Tianjin NSCC 2026 on BreachHistory.