diff --git a/public/js/ui/gameLogic/placement.js b/public/js/ui/gameLogic/placement.js
index e166fefc..cd0ad0fa 100644
--- a/public/js/ui/gameLogic/placement.js
+++ b/public/js/ui/gameLogic/placement.js
@@ -301,7 +301,8 @@ function unitAllowed(ctx, piece, row, col, owner = null) {
  *     must be legal on the source tile); from hand/temp the deploy cap applies unless a chess occupant swaps out.
  *   board ← token: legal tile; from the hand the tile must be empty and its summoner deployed; board ↔ board swaps.
  *   hand ← chess from the board: empty slot (withdraw), chess occupant (swap, legal on the source tile), otherwise
- *     it goes to any free slot (HAND_FULL when none). hand ← token from the board: always (back onto its stack).
+ *     it uses a free slot or one freed by its own summon stack (HAND_FULL when none). hand ← token from the board:
+ *     always (back onto its stack).
  *   hand ← hand/temp piece: move / swap. hand ← EQUIP item onto a chess: equip; onto a non-chess: swap.
  *   board ← EQUIP item: equip the chess on that tile. board ← MAGIC (Arts): used on that tile.
  * @param {ReturnType<typeof placementContext>} ctx
@@ -334,8 +335,11 @@ export function canPlace(ctx, uid, target) {
         if (!tileAllows(ctx, occ.piece, src.row, src.col)) return no('BAD_TILE', t('交换后的单位无法部署在原位置'));
         return { ok: true, action: 'swap' };
       }
-      // the withdrawn operator goes to another free slot
-      const free = [...Array(GEO.HAND_SIZE).keys()].some((i) => !ctx.handAt.has(i));
+      // Withdrawal removes the operator's own summon stacks, freeing their hand slots too.
+      const free = [...Array(GEO.HAND_SIZE).keys()].some((i) => {
+        const p = ctx.handAt.get(i)?.piece;
+        return !p || (p.kind === 'token' && p.ownerUid === piece.uid);
+      });
       return free ? { ok: true, action: 'move' } : no('HAND_FULL', t('整备区已满'));
     }
     return { ok: true, action: 'swap' };
diff --git a/test/ui/gameLogic.test.js b/test/ui/gameLogic.test.js
index 7a383f7f..3f0089cc 100644
--- a/test/ui/gameLogic.test.js
+++ b/test/ui/gameLogic.test.js
@@ -442,6 +442,58 @@ describe('placement mirror (canPlace)', () => {
     assert.equal(canPlace(ctx, h0.uid, { area: 'hand', idx: 10 }).ok, false);
     assert.equal(canPlace(ctx, h0.uid, { area: 'hand', idx: -1 }).ok, false);
   });
+  test('summoner withdrawal: a full hand accepts a drop onto its own summon stack', () => {
+    const b = { ...piece('chess_char_2_02_a'), row: 10, col: 4 };
+    const stack = { uid: ++uid, kind: 'token', id: 'token_10000_silent_healrb', ownerUid: b.uid, count: 1 };
+    const ctx = ctxFor(privWith({ board: [b], hand: [...Array.from({ length: 9 }, () => item(EQUIP)), stack] }));
+    const to = { area: 'hand', idx: 9 };
+    assert.deepEqual(canPlace(ctx, b.uid, to), { ok: true, action: 'move' });
+    assert.deepEqual(dropIntent(ctx, b.uid, to), { t: 'g.move', fields: { uid: b.uid, to } });
+    assert.equal(dropFailureReason(ctx, b.uid, to), null);
+  });
+  test('summoner withdrawal: its own stack frees space when dropped onto another item or token', () => {
+    const b = { ...piece('chess_char_2_02_a'), row: 10, col: 4 };
+    const stack = { uid: ++uid, kind: 'token', id: 'token_10000_silent_healrb', ownerUid: b.uid, count: 1 };
+    const other = { ...stack, uid: ++uid, ownerUid: ++uid };
+    const ctx = ctxFor(privWith({ board: [b], hand: [...Array.from({ length: 8 }, () => item(EQUIP)), other, stack] }));
+    for (const idx of [0, 8]) {
+      const to = { area: 'hand', idx };
+      assert.deepEqual(canPlace(ctx, b.uid, to), { ok: true, action: 'move' });
+      assert.deepEqual(dropIntent(ctx, b.uid, to), { t: 'g.move', fields: { uid: b.uid, to } });
+      assert.equal(dropFailureReason(ctx, b.uid, to), null);
+    }
+  });
+  test('summoner withdrawal: a full hand without its own hand stack still refuses the move', () => {
+    const b = { ...piece('chess_char_2_02_a'), row: 10, col: 4 };
+    const stack = { uid: ++uid, kind: 'token', id: 'token_10000_silent_healrb', ownerUid: b.uid, count: 1 };
+    const other = { ...stack, uid: ++uid, ownerUid: ++uid };
+    const hand = Array.from({ length: 10 }, () => item(EQUIP));
+    const cases = [
+      privWith({ board: [b], hand }),
+      privWith({ board: [{ ...b, id: MELEE }], hand }),
+      privWith({ board: [b], hand: [...hand.slice(0, 9), other] }),
+      privWith({ board: [b], hand, temp: [stack] }),
+      privWith({ board: [b, { ...stack, row: 9, col: 3 }], hand }),
+      privWith({ board: [b], hand: [...hand.slice(0, 9), { ...item(EQUIP), ownerUid: b.uid }] }),
+    ];
+    for (const priv of cases) {
+      const ctx = ctxFor(priv);
+      for (const idx of [0, 9]) {
+        const to = { area: 'hand', idx };
+        assert.equal(canPlace(ctx, b.uid, to).code, 'HAND_FULL');
+        assert.equal(dropIntent(ctx, b.uid, to), null);
+        assert.equal(dropFailureReason(ctx, b.uid, to), '整备区已满');
+      }
+    }
+  });
+  test('summoner withdrawal: freed space does not bypass an illegal chess swap', () => {
+    const b = { ...piece('chess_char_2_02_a'), row: 10, col: 4 };
+    const stack = { uid: ++uid, kind: 'token', id: 'token_10000_silent_healrb', ownerUid: b.uid, count: 1 };
+    const ctx = ctxFor(privWith({ board: [b], hand: [piece(MELEE), ...Array.from({ length: 8 }, () => item(EQUIP)), stack] }));
+    const to = { area: 'hand', idx: 0 };
+    assert.equal(canPlace(ctx, b.uid, to).code, 'BAD_TILE');
+    assert.equal(dropIntent(ctx, b.uid, to), null);
+  });
   test('items: equip on chess (board or hand), arts on tiles, not on tokens', () => {
     const b = { ...piece(MELEE), row: 9, col: 3 };
     const hChess = piece(RANGED);