diff --git a/crates/fidc-core/src/platform_expr_strategy.rs b/crates/fidc-core/src/platform_expr_strategy.rs
index 4f049b1..441b6f7 100644
--- a/crates/fidc-core/src/platform_expr_strategy.rs
+++ b/crates/fidc-core/src/platform_expr_strategy.rs
@@ -8362,7 +8362,7 @@ impl Strategy for PlatformExprStrategy {
         let mut pending_full_close_symbols = BTreeSet::<String>::new();
         let mut slot_blocking_symbols = BTreeSet::<String>::new();
         let should_block_released_slots_after_top_up = delayed_open_exit_submitted;
-        let should_block_partial_stop_residual_slot =
+        let should_block_partial_exit_residual_slot =
             should_block_released_slots_after_top_up || trading_ratio < 1.0;
         let interleaved_pending_full_close_symbols = BTreeSet::<String>::new();
         let risk_level_forced_exit_time = self.risk_level_forced_exit_time();
@@ -8741,7 +8741,9 @@ impl Strategy for PlatformExprStrategy {
                     self.pending_full_close_symbols.remove(&position.symbol);
                 } else {
                     exit_symbols.insert(position.symbol.clone());
-                    slot_blocking_symbols.insert(position.symbol.clone());
+                    if should_block_partial_exit_residual_slot {
+                        slot_blocking_symbols.insert(position.symbol.clone());
+                    }
                     order_intents.push(OrderIntent::TargetValue {
                         symbol: position.symbol.clone(),
                         target_value: 0.0,
@@ -8768,7 +8770,9 @@ impl Strategy for PlatformExprStrategy {
                                 self.pending_full_close_symbols.remove(&position.symbol);
                             } else {
                                 pending_full_close_symbols.insert(position.symbol.clone());
-                                slot_blocking_symbols.insert(position.symbol.clone());
+                                if should_block_partial_exit_residual_slot {
+                                    slot_blocking_symbols.insert(position.symbol.clone());
+                                }
                                 self.pending_full_close_symbols
                                     .insert(position.symbol.clone());
                             }
@@ -8811,7 +8815,7 @@ impl Strategy for PlatformExprStrategy {
                             self.pending_full_close_symbols.remove(&position.symbol);
                         } else {
                             pending_full_close_symbols.insert(position.symbol.clone());
-                            if should_block_partial_stop_residual_slot {
+                            if should_block_partial_exit_residual_slot {
                                 slot_blocking_symbols.insert(position.symbol.clone());
                             }
                             self.pending_full_close_symbols
@@ -8881,7 +8885,9 @@ impl Strategy for PlatformExprStrategy {
                             self.pending_full_close_symbols.remove(&position.symbol);
                         } else {
                             pending_full_close_symbols.insert(position.symbol.clone());
-                            slot_blocking_symbols.insert(position.symbol.clone());
+                            if should_block_partial_exit_residual_slot {
+                                slot_blocking_symbols.insert(position.symbol.clone());
+                            }
                             self.pending_full_close_symbols
                                 .insert(position.symbol.clone());
                         }
@@ -22021,8 +22027,7 @@ mod tests {
         assert_eq!(top_up_symbols, vec!["000001.SZ"]);
     }
 
-    #[test]
-    fn platform_aiquant_carried_full_close_does_not_release_new_top_up_slot() {
+    fn carried_full_close_top_up_symbols_for_exposure(exposure_expr: &str) -> Vec<String> {
         let prev_date = d(2025, 4, 29);
         let date = d(2025, 4, 30);
         let buy_first = "000001.SZ";
@@ -22166,7 +22171,7 @@ mod tests {
         cfg.market_cap_upper_expr = "1000".to_string();
         cfg.selection_limit_expr = "4".to_string();
         cfg.stock_filter_expr = "close > 0".to_string();
-        cfg.exposure_expr = "1.0".to_string();
+        cfg.exposure_expr = exposure_expr.to_string();
         cfg.take_profit_expr = "1.1".to_string();
         cfg.daily_top_up_enabled = true;
         cfg.release_slot_on_exit_signal = true;
@@ -22184,7 +22189,7 @@ mod tests {
             .iter()
             .filter_map(|intent| match intent {
                 OrderIntent::Value { symbol, reason, .. } if reason == "daily_top_up_buy" => {
-                    Some(symbol.as_str())
+                    Some(symbol.clone())
                 }
                 _ => None,
             })
@@ -22204,19 +22209,24 @@ mod tests {
             "{:?}",
             decision.order_intents
         );
+        top_up_symbols
+    }
+
+    #[test]
+    fn platform_full_exposure_carried_full_close_releases_second_top_up_slot() {
+        let top_up_symbols = carried_full_close_top_up_symbols_for_exposure("1.0");
         assert_eq!(
             top_up_symbols,
-            vec![buy_first],
-            "{:?}",
-            decision.order_intents
-        );
-        assert!(
-            !top_up_symbols.contains(&buy_second),
-            "{:?}",
-            decision.order_intents
+            vec!["000001.SZ".to_string(), "000002.SZ".to_string()]
         );
     }
 
+    #[test]
+    fn platform_weak_exposure_carried_full_close_keeps_residual_slot() {
+        let top_up_symbols = carried_full_close_top_up_symbols_for_exposure("0.5");
+        assert!(top_up_symbols.is_empty(), "{top_up_symbols:?}");
+    }
+
     #[test]
     fn platform_max_holding_days_exit_preempts_take_profit_exit() {
         let date = d(2025, 2, 26);