diff --git a/Helpers/SimApiUtil.cs b/Helpers/SimApiUtil.cs
index 6eba65b..14023d2 100644
--- a/Helpers/SimApiUtil.cs
+++ b/Helpers/SimApiUtil.cs
@@ -3,6 +3,7 @@ using System.Security.Cryptography;
 using System.Text;
 using System.Text.Encodings.Web;
 using System.Text.Json;
+using System.Text.Json.Serialization;
 using System.Text.RegularExpressions;
 using System.Text.Unicode;
 
@@ -13,18 +14,22 @@ namespace SimApi.Helpers
         /// <summary>
         /// 当前CST时间
         /// </summary>
-        public static DateTime CstNow
+        public static DateTime CstNow => DateTime.UtcNow.AddHours(8);
+
+        /// <summary>
+        /// JSON序列化常规选项
+        /// </summary>
+        public static JsonSerializerOptions JsonOption => new()
         {
-            get => DateTime.UtcNow.AddHours(8);
-        }
+            Encoder = JavaScriptEncoder.Create(UnicodeRanges.All),
+            PropertyNamingPolicy = JsonNamingPolicy.CamelCase,
+            DefaultIgnoreCondition = JsonIgnoreCondition.WhenWritingNull
+        };
 
         /// <summary>
         /// 当前秒级时间戳
         /// </summary>
-        public static double TimestampNow
-        {
-            get => (DateTime.UtcNow - new DateTime(1970, 1, 1, 0, 0, 0, 0)).TotalSeconds;
-        }
+        public static double TimestampNow => (DateTime.UtcNow - new DateTime(1970, 1, 1, 0, 0, 0, 0)).TotalSeconds;
 
         /// <summary>
         /// 检测手机号是否正确
@@ -45,13 +50,13 @@ namespace SimApi.Helpers
         /// <returns></returns>
         public static string Md5(string source, string mode = "x2")
         {
-            byte[] sor = Encoding.UTF8.GetBytes(source);
-            MD5 md5 = MD5.Create();
-            byte[] result = md5.ComputeHash(sor);
-            StringBuilder strbul = new StringBuilder(40);
-            for (int i = 0; i < result.Length; i++)
+            var sor = Encoding.UTF8.GetBytes(source);
+            var md5 = MD5.Create();
+            var result = md5.ComputeHash(sor);
+            var strbul = new StringBuilder(40);
+            foreach (var t in result)
             {
-                strbul.Append(result[i].ToString(mode));
+                strbul.Append(t.ToString(mode));
             }
 
             return strbul.ToString();
@@ -64,10 +69,7 @@ namespace SimApi.Helpers
         /// <returns></returns>
         public static string Json(object obj)
         {
-            return JsonSerializer.Serialize(obj, new JsonSerializerOptions
-            {
-                Encoder = JavaScriptEncoder.Create(UnicodeRanges.All)
-            });
+            return JsonSerializer.Serialize(obj, JsonOption);
         }
     }
 }
\ No newline at end of file
diff --git a/Synapse/EventClient.cs b/Synapse/EventClient.cs
index f2f5ef8..2e3f87e 100644
--- a/Synapse/EventClient.cs
+++ b/Synapse/EventClient.cs
@@ -4,6 +4,7 @@ using System.Text.Encodings.Web;
 using System.Text.Json;
 using System.Text.Unicode;
 using Microsoft.Extensions.Logging;
+using SimApi.Helpers;
 
 namespace SimApi;
 
@@ -16,11 +17,7 @@ public partial class Synapse
 
     private void FireEvent(string eventName, object param)
     {
-        var paramJson = JsonSerializer.Serialize(param, new JsonSerializerOptions
-        {
-            Encoder = JavaScriptEncoder.Create(UnicodeRanges.All),
-            PropertyNamingPolicy = JsonNamingPolicy.CamelCase,
-        });
+        var paramJson = JsonSerializer.Serialize(param, SimApiUtil.JsonOption);
         var router = $"event.{Options.AppName}.{eventName}";
         var props = EventClientChannel.CreateBasicProperties();
         props.AppId = Options.AppId;
diff --git a/Synapse/EventServer.cs b/Synapse/EventServer.cs
index 5754c68..5b2b843 100644
--- a/Synapse/EventServer.cs
+++ b/Synapse/EventServer.cs
@@ -5,6 +5,7 @@ using System.Text.Json;
 using Microsoft.Extensions.DependencyInjection;
 using Microsoft.Extensions.Logging;
 using RabbitMQ.Client.Events;
+using SimApi.Helpers;
 
 namespace SimApi;
 
@@ -35,13 +36,7 @@ public partial class Synapse
             {
                 mt.Invoke(callClass, pt == typeof(string)
                     ? new object[] { reqBody }
-                    : new[]
-                    {
-                        JsonSerializer.Deserialize(reqBody, pt, new JsonSerializerOptions
-                        {
-                            PropertyNamingPolicy = JsonNamingPolicy.CamelCase
-                        })
-                    });
+                    : new[] { JsonSerializer.Deserialize(reqBody, pt, SimApiUtil.JsonOption) });
                 EventServerChannel.BasicAck(ea.DeliveryTag, false);
             }
             catch (Exception e)
diff --git a/Synapse/RpcClient.cs b/Synapse/RpcClient.cs
index 2ab8b6c..a0cc75c 100644
--- a/Synapse/RpcClient.cs
+++ b/Synapse/RpcClient.cs
@@ -38,11 +38,7 @@ public partial class Synapse
 
     private object FireRpc(string app, string action, object param)
     {
-        var paramJson = JsonSerializer.Serialize(param, new JsonSerializerOptions
-        {
-            Encoder = JavaScriptEncoder.Create(UnicodeRanges.All),
-            PropertyNamingPolicy = JsonNamingPolicy.CamelCase,
-        });
+        var paramJson = JsonSerializer.Serialize(param, SimApiUtil.JsonOption);
         var router = $"server.{app}";
         SimApiBaseResponse response;
         var props = RpcClientChannel.CreateBasicProperties();
@@ -65,11 +61,7 @@ public partial class Synapse
             if (ResponseCache.TryGetValue(props.MessageId, out var value))
             {
                 response = JsonSerializer.Deserialize<SimApiBaseResponse<object>>(
-                    Encoding.UTF8.GetString(value), new JsonSerializerOptions
-                    {
-                        PropertyNamingPolicy = JsonNamingPolicy.CamelCase,
-                        Encoder = JavaScriptEncoder.Create(UnicodeRanges.All)
-                    });
+                    Encoding.UTF8.GetString(value), SimApiUtil.JsonOption);
                 ResponseCache.Remove(props.MessageId);
                 break;
             }
diff --git a/Synapse/RpcServer.cs b/Synapse/RpcServer.cs
index 7706e18..cc857bb 100644
--- a/Synapse/RpcServer.cs
+++ b/Synapse/RpcServer.cs
@@ -4,6 +4,7 @@ using System.Reflection;
 using System.Text;
 using System.Text.Encodings.Web;
 using System.Text.Json;
+using System.Text.Json.Serialization;
 using System.Text.Unicode;
 using Microsoft.Extensions.DependencyInjection;
 using Microsoft.Extensions.Logging;
@@ -48,10 +49,7 @@ public partial class Synapse
                     }
                     else
                     {
-                        var paramObj = JsonSerializer.Deserialize(reqBody, pt, new JsonSerializerOptions
-                        {
-                            PropertyNamingPolicy = JsonNamingPolicy.CamelCase
-                        });
+                        var paramObj = JsonSerializer.Deserialize(reqBody, pt, SimApiUtil.JsonOption);
                         param = new[] { paramObj };
                     }
                     var ret = mt.Invoke(callClass, param);
@@ -59,9 +57,8 @@ public partial class Synapse
                 }
                 catch (TargetInvocationException e)
                 {
-                    if (e.InnerException is SimApiException)
+                    if (e.InnerException is SimApiException ie)
                     {
-                        var ie = e.InnerException as SimApiException;
                         Logger.LogDebug("RPC调用错误: {Err}", ie.Message);
                         res = new SimApiBaseResponse(ie.Code, ie.Message);
                     }
@@ -77,11 +74,7 @@ public partial class Synapse
                 }
             }
 
-            var returnJson = JsonSerializer.Serialize((object)res, new JsonSerializerOptions
-            {
-                Encoder = JavaScriptEncoder.Create(UnicodeRanges.All),
-                PropertyNamingPolicy = JsonNamingPolicy.CamelCase,
-            });
+            var returnJson = JsonSerializer.Serialize((object)res, SimApiUtil.JsonOption);
             var reply = $"client.{ea.BasicProperties.ReplyTo}.{ea.BasicProperties.AppId}";
             var props = RpcServerChannel.CreateBasicProperties();
             props.AppId = Options.AppId;