# Historical blocking: CN 2023-12-11

**Country:** 🇨🇳 China (CN)
**Date:** 2023-12-11
**Type:** Censorship
**Severity:** CRITICAL
**Status:** confirmed

## Summary

Backfilled from OONI historical archive. 1 anomalous day(s), 4 measurements, 98% anomaly rate. Signal types: block, interference. Signal levels: critical.

## Metrics

- Confidence: 98%
- Measurements (stored incident count; not the qualifying evidence count): 4
- Anomaly Rate: 98.2%

## What we cannot say

- **Who caused it** — measurement data alone does not attribute the interference to any government, ISP, or other actor.
- **Intent** — anomalous or unreachable measurements indicate interference, not a stated motive or a deliberate-vs-incidental determination.
- **Which networks** — no specific ASN/ISP is identified for this incident.
- **Sub-national scope** — measurement is aggregated at the country level; we cannot localize to a province, city, or network segment.
- **Independent corroboration** — fewer than two source labels appear in qualifying linked evidence; stored incident source labels may include quarantined OONI observations.

## Data Sources

No qualifying linked evidence sources

These source labels come from qualifying linked evidence. Historical incident source labels and quarantined observations are excluded; multiple labels alone do not establish independent corroboration.

## Citation

Voidly Research. (2026). Historical blocking: CN 2023-12-11 [CN-2023-0542]. Retrieved from https://voidly.ai/incident/CN-2023-0542

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*Report generated by Voidly Research on 2026-10-12*
*Data licensed under CC BY 4.0*
*Incident ID: CN-2023-0542*
*Permalink: https://voidly.ai/incident/CN-2023-0542*