diff --git a/src/main/java/com/ffii/fpsms/modules/stock/service/StockInLineService.kt b/src/main/java/com/ffii/fpsms/modules/stock/service/StockInLineService.kt
index cdc80c3..f018853 100644
--- a/src/main/java/com/ffii/fpsms/modules/stock/service/StockInLineService.kt
+++ b/src/main/java/com/ffii/fpsms/modules/stock/service/StockInLineService.kt
@@ -740,35 +740,36 @@ open class StockInLineService(
         )
     }
     @Transactional
-    private fun createStockLedgerForStockIn(stockInLine: StockInLine) {
-        val item = stockInLine.item ?: return
-        val inventory = inventoryRepository.findByItemId(item.id!!).orElse(null) ?: return
+private fun createStockLedgerForStockIn(stockInLine: StockInLine) {
+    val item = stockInLine.item ?: return
+    val inventory = inventoryRepository.findByItemId(item.id!!).orElse(null) ?: return
+
+    val inQty = stockInLine.acceptedQty?.toDouble() ?: 0.0
     
-        val inQty = stockInLine.acceptedQty?.toDouble() ?: 0.0
-        
-        // ✅ 修复：查询最新的 stock_ledger 记录，基于前一笔 balance 计算
-        val latestLedger = stockLedgerRepository.findLatestByItemId(item.id!!).firstOrNull()
-        
-        val previousBalance = latestLedger?.balance 
-            ?: (inventory.onHandQty ?: BigDecimal.ZERO).toDouble()
-        
-        val newBalance = previousBalance + inQty
+    // ✅ 修复：查询最新的 stock_ledger 记录，基于前一笔 balance 计算
+    val latestLedger = stockLedgerRepository.findLatestByItemId(item.id!!).firstOrNull()
     
-        val stockLedger = StockLedger().apply {
-            this.stockInLine = stockInLine
-            this.inventory = inventory
-            this.inQty = inQty
-            this.outQty = null
-            this.balance = newBalance 
-            this.type = stockInLine.type
-            this.itemId = item.id
-            this.itemCode = item.code
-            this.date = LocalDate.now()
-        }
+    // ✅ 修复：如果 latestLedger 为 null（第一次 stock in），previousBalance 应该是 0
+    // 因为 inventory.onHandQty 已经被触发器更新为包含本次 stock in 的数量
+    val previousBalance = latestLedger?.balance ?: 0.0
     
-        stockLedgerRepository.saveAndFlush(stockLedger)
+    val newBalance = previousBalance + inQty
+
+    val stockLedger = StockLedger().apply {
+        this.stockInLine = stockInLine
+        this.inventory = inventory
+        this.inQty = inQty
+        this.outQty = null
+        this.balance = newBalance 
+        this.type = stockInLine.type
+        this.itemId = item.id
+        this.itemCode = item.code
+        this.date = LocalDate.now()
     }
 
+    stockLedgerRepository.saveAndFlush(stockLedger)
+}
+
     @Transactional
     open fun createStockIn(request: StockInRequest): StockInLine {
         // Step 1: Create a row of stock_in