diff --git a/Tiobon.Core.Services/Ghre/Ghre_ExamRecordServices.cs b/Tiobon.Core.Services/Ghre/Ghre_ExamRecordServices.cs
index c20b919f..0135491e 100644
--- a/Tiobon.Core.Services/Ghre/Ghre_ExamRecordServices.cs
+++ b/Tiobon.Core.Services/Ghre/Ghre_ExamRecordServices.cs
@@ -2,7 +2,9 @@
 using Microsoft.EntityFrameworkCore;
 using Microsoft.Extensions.Logging;
 using MongoDB.Driver.Linq;
+using MySqlX.XDevAPI.Common;
 using System.Net;
+using System.Text;
 using System.Text.RegularExpressions;
 using static Tiobon.Core.Model.Consts;
 
@@ -1682,6 +1684,18 @@ public class Ghre_ExamRecordServices : BaseServices<Ghre_ExamRecord, Ghre_ExamRe
         return ServiceResult.OprateSuccess("发放成功！");
     }
 
+
+    private static string CreateRandomNum(int num)
+    {
+        string str = "0123456789";
+        StringBuilder sb = new StringBuilder();
+        for (int i = 0; i < num; i++)
+        {
+            sb.Append(str[new Random(Guid.NewGuid().GetHashCode()).Next(0, str.Length - 1)]);
+        }
+        return sb.ToString();
+    }
+
     /// <summary>
     /// 处理证书数据
     /// </summary>
@@ -1708,6 +1722,10 @@ public class Ghre_ExamRecordServices : BaseServices<Ghre_ExamRecord, Ghre_ExamRe
         {
             var rule = rules[j];
 
+            var certificateNoItems = await Db.Queryable<Ghre_CertificateDesignItem>()
+                .Where(x => x.CertificateRuleId == rule.Id && x.field == "CertificateNo")
+                .FirstAsync();
+
             if (examRecordId != null)
             {
                 if (rule.SendRule == "ExamPass" && !await Db.Queryable<Ghre_ExamRecord>()
@@ -1759,6 +1777,22 @@ public class Ghre_ExamRecordServices : BaseServices<Ghre_ExamRecord, Ghre_ExamRe
                 Reverse1 = studyRecordId != null ? $"{studyRecordId}" : $"{examRecordId}"
 
             };
+
+            certificate.CertificateNo = SnowFlakeSingle.Instance.NextId().ObjToString();
+
+            if (certificateNoItems != null)
+            {
+                if (certificateNoItems.certNoRule == "manual")
+                    certificate.CertificateNo = rule.Id.ObjToString();
+                else if (certificateNoItems.certNoRule == "fixed")
+                {
+                    var certNoFixed = certificateNoItems.certNoFixed;
+                    int length = 22 - (certNoFixed.IsNotEmptyOrNull() ? certNoFixed.Length : 0);
+
+                    certificate.CertificateNo = certNoFixed + CreateRandomNum(length);
+                }
+            }
+
             await Db.Insertable(certificate).ExecuteReturnSnowflakeIdAsync();
         }