diff --git a/payapi/src/main/java/com/supwisdom/dlpay/framework/util/StringUtil.java b/payapi/src/main/java/com/supwisdom/dlpay/framework/util/StringUtil.java
index adc71b5..ff4084c 100644
--- a/payapi/src/main/java/com/supwisdom/dlpay/framework/util/StringUtil.java
+++ b/payapi/src/main/java/com/supwisdom/dlpay/framework/util/StringUtil.java
@@ -264,11 +264,12 @@
     if (bankCard.length() < 15 || bankCard.length() > 19) {
       return false;
     }
-    char bit = getBankCardCheckCode(bankCard.substring(0, bankCard.length() - 1));
-    if (bit == 'N') {
-      return false;
-    }
-    return bankCard.charAt(bankCard.length() - 1) == bit;
+    return true;
+//    char bit = getBankCardCheckCode(bankCard.substring(0, bankCard.length() - 1));
+//    if (bit == 'N') {
+//      return false;
+//    }
+//    return bankCard.charAt(bankCard.length() - 1) == bit;
   }