# Historical blocking: CN 2022-07-20 to 2022-08-04

**Country:** 🇨🇳 China (CN)
**Date:** 2022-07-20
**Type:** Censorship
**Severity:** CRITICAL
**Status:** confirmed

## Summary

Backfilled from OONI historical archive. 14 anomalous day(s), 47 measurements, 95% anomaly rate. Signal types: block, interference. Signal levels: critical.

## Metrics

- Confidence: 99%
- Measurements: 47
- Anomaly Rate: 95.3%

## 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** — this rests on a single source; treat it as a single-source signal, not a multi-source confirmation.

## Data Sources

ooni-historical-backfill

## Citation

Voidly Research. (2026). Historical blocking: CN 2022-07-20 to 2022-08-04 [CN-2022-0341]. Retrieved from https://voidly.ai/incident/CN-2022-0341

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*Report generated by Voidly Research on 2026-06-21*
*Data licensed under CC BY 4.0*
*Incident ID: CN-2022-0341*
*Permalink: https://voidly.ai/incident/CN-2022-0341*