diff --git a/server/assets/atlas/admin1.geojson.gz b/server/assets/atlas/admin1.geojson.gz
index ab15bff1b..6c833aeae 100644
Binary files a/server/assets/atlas/admin1.geojson.gz and b/server/assets/atlas/admin1.geojson.gz differ
diff --git a/server/scripts/build-atlas-geo.mjs b/server/scripts/build-atlas-geo.mjs
index 29cd5d33c..19a9c91f6 100644
--- a/server/scripts/build-atlas-geo.mjs
+++ b/server/scripts/build-atlas-geo.mjs
@@ -180,7 +180,11 @@ function normalizeAdm1(geo, a3, countryName) {
     return code
   }
   return geo.features.map(f => {
-    const name = f.properties?.shapeName || ''
+    let name = f.properties?.shapeName || ''
+    // geoBoundaries erroneously names Guangdong Province as "Guangzhou Province" (Guangzhou is the capital city).
+    if (a3 === 'CHN' && name === 'Guangzhou Province') {
+      name = 'Guangdong Province'
+    }
     const geometry = quantizeGeometry(f.geometry, ADM1_DECIMALS)
     if (!geometry) return null
     // shapeISO is a real ISO 3166-2 code for most features, but geoBoundaries sometimes
diff --git a/server/src/db/migrations.ts b/server/src/db/migrations.ts
index 47bdb3555..c26f6cc09 100644
--- a/server/src/db/migrations.ts
+++ b/server/src/db/migrations.ts
@@ -4374,6 +4374,47 @@ function runMigrations(db: Database.Database): void {
       `);
       db.exec('CREATE INDEX IF NOT EXISTS idx_roadtrip_day_tracks_place ON roadtrip_day_tracks(place_id)');
     },
+    /**
+     * Rename the misnamed Guangdong Province (shipped as "Guangzhou Province").
+     *
+     * geoBoundaries labelled the whole province with the name of its capital, so
+     * every row a user collected under it carries the wrong code. All three
+     * tables that key on a region are moved over: the two per-user ones with an
+     * UPDATE OR IGNORE plus a DELETE, because a user who already holds the
+     * correct region would otherwise hit the unique index and keep a duplicate,
+     * and place_regions with a plain UPDATE, because place_id is its primary key
+     * and nothing there can collide.
+     *
+     * Appended LAST: the array is index-addressed against schema_version.
+     */
+    () => {
+      db.prepare(
+        `UPDATE OR IGNORE visited_regions
+         SET region_code = 'CN-GUANGDONGPROVINCE', region_name = 'Guangdong Province'
+         WHERE UPPER(country_code) = 'CN' AND (region_code = 'CN-GUANGZHOUPROVINCE' OR region_name = 'Guangzhou Province')`,
+      ).run();
+      db.prepare(
+        `DELETE FROM visited_regions
+         WHERE UPPER(country_code) = 'CN' AND (region_code = 'CN-GUANGZHOUPROVINCE' OR region_name = 'Guangzhou Province')`,
+      ).run();
+      db.prepare(
+        `UPDATE OR IGNORE place_regions
+         SET region_code = 'CN-GUANGDONGPROVINCE', region_name = 'Guangdong Province'
+         WHERE UPPER(country_code) = 'CN' AND (region_code = 'CN-GUANGZHOUPROVINCE' OR region_name = 'Guangzhou Province')`,
+      ).run();
+      // hidden_regions is the other direction: it remembers which derived region
+      // a user switched off. Left behind, the tombstone stops matching and the
+      // region a user deliberately hid comes back.
+      db.prepare(
+        `UPDATE OR IGNORE hidden_regions
+         SET region_code = 'CN-GUANGDONGPROVINCE'
+         WHERE UPPER(country_code) = 'CN' AND region_code = 'CN-GUANGZHOUPROVINCE'`,
+      ).run();
+      db.prepare(
+        `DELETE FROM hidden_regions
+         WHERE UPPER(country_code) = 'CN' AND region_code = 'CN-GUANGZHOUPROVINCE'`,
+      ).run();
+    },
   ];
 
   if (currentVersion < migrations.length) {
diff --git a/server/tests/unit/db/migration-hygiene.test.ts b/server/tests/unit/db/migration-hygiene.test.ts
index 44b4ecd88..5b9741cc1 100644
--- a/server/tests/unit/db/migration-hygiene.test.ts
+++ b/server/tests/unit/db/migration-hygiene.test.ts
@@ -135,6 +135,8 @@ const ALLOWED_DESTRUCTIVE: Record<string, string> = {
     'Atlas enclave fix: DELETE ... WHERE place_id IN (places inside specific enclave boxes) — invalidate stale region cache; re-resolved on next request.',
   'DELETE FROM visited_regions':
     'Atlas geoBoundaries swap (#1119): DELETE ... WHERE id = ? — after UPDATE OR IGNORE re-codes a manually-marked region to its current code, drop only the single leftover row whose UNIQUE(user_id, region_code) collision caused the update to be skipped (a duplicate of a region the user already has).',
+  'DELETE FROM hidden_regions':
+    'Guangdong rename (#2284): DELETE ... WHERE region_code = the retired CN-GUANGZHOUPROVINCE, run right after an UPDATE OR IGNORE re-codes the tombstone. Only a row the update had to skip survives to here, and it can only be skipped because UNIQUE(user_id, region_code) already holds the same tombstone under the correct code, so the user keeps the region hidden either way.',
   'DELETE FROM reservation_day_positions':
     'DELETE ... WHERE the row joins a reservation and a day sitting on different trips. The table has no trip_id and its two foreign keys only require the ids to exist, so a pair that never belonged together was storable; the writer scopes to the trip now and this clears what earlier builds allowed. Bounded by the join — a row whose reservation and day agree on their trip is untouched.',
 };
diff --git a/server/tests/unit/services/atlasBundle.test.ts b/server/tests/unit/services/atlasBundle.test.ts
index 1eff452d7..c2694b901 100644
--- a/server/tests/unit/services/atlasBundle.test.ts
+++ b/server/tests/unit/services/atlasBundle.test.ts
@@ -78,4 +78,14 @@ describe('Atlas admin1 region bundle (#1217)', () => {
       expect(names.has(borough), `${borough} should be a region of its own`).toBe(true);
     }
   });
+
+  it('ATLAS-BUNDLE-006 — China ships Guangdong Province, not Guangzhou Province', () => {
+    const cn = (features as unknown as { properties: { iso_a2: string | null; name?: string; iso_3166_2: string } }[])
+      .filter(f => f.properties.iso_a2 === 'CN');
+    const names = cn.map(f => f.properties.name);
+    expect(names).toContain('Guangdong Province');
+    expect(names).not.toContain('Guangzhou Province');
+    expect(cn.some(f => f.properties.iso_3166_2 === 'CN-GUANGDONGPROVINCE')).toBe(true);
+    expect(cn.some(f => f.properties.iso_3166_2 === 'CN-GUANGZHOUPROVINCE')).toBe(false);
+  });
 });