diff --git a/YLErpWeb/Controllers/BondController.cs b/YLErpWeb/Controllers/BondController.cs
index 36ef4f85..9a367b76 100644
--- a/YLErpWeb/Controllers/BondController.cs
+++ b/YLErpWeb/Controllers/BondController.cs
@@ -7,8 +7,12 @@ namespace YLErp.Web.Controllers
     {
 
         [AllowAnonymous]
-        public JsonResult CalcBond(string underlyingCode, decimal price, string priceType, string targetDate = null)
+        public JsonResult CalcBond(string underlyingCode, decimal price, string priceType, string targetDate = null, string source = null)
         {
+            // EQD-6953：source 标记调用场景（unwind=平仓页；录入页不传）。BondCalcHepler 已记录
+            // 完整请求参数与成败结果，此处仅补场景维度，定位问题时先按 source 区分入口再看参数。
+            LogFactory.GetLogger("BondController").Info(
+                $"CalcBond source={source ?? "(未标记)"} underlyingCode={underlyingCode} price={price} priceType={priceType} targetDate={targetDate ?? "(空→代理默认T+1)"}");
             string errorMsg;
             var obj = BondCalcHepler.BondCalc(underlyingCode, price, priceType, out errorMsg, targetDate);
             if (obj == null)