Is www.ncbi.nlm.nih.gov/books/NBK21535 blocked in mainland China?

Can you open www.ncbi.nlm.nih.gov/books/NBK21535 from mainland China?

Yes.

All 1 recent conclusive tests connected normally.

2017first tested

0/1disrupted · last 90 days

9 d agolast tested

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Other tested URLs on nih.gov

Blocking varies across nih.gov: 1 blocked vs 32 accessible among tested hosts.

Each verdict covers the last 90 days of tests, as on that URL's own page.

Frequently asked questions

Is www.ncbi.nlm.nih.gov/books/NBK21535 blocked in mainland China right now?

As of the last test on 2026-07-21, www.ncbi.nlm.nih.gov/books/NBK21535 is not blocked in mainland China, based on GreatFire's live Great Firewall measurements.

https://www.ncbi.nlm.nih.gov/books/NBK21535 · JSON