diff --git a/tinyflow-java-core/src/main/java/dev/tinyflow/core/parser/impl/LlmNodeParser.java b/tinyflow-java-core/src/main/java/dev/tinyflow/core/parser/impl/LlmNodeParser.java
index f489c752b202e958e34215ba8bb12b831103d7b9..ea8aebe68eee30205743510f2125679b45427ce2 100644
--- a/tinyflow-java-core/src/main/java/dev/tinyflow/core/parser/impl/LlmNodeParser.java
+++ b/tinyflow-java-core/src/main/java/dev/tinyflow/core/parser/impl/LlmNodeParser.java
@@ -37,9 +37,9 @@ public class LlmNodeParser extends BaseNodeParser {
 
 
         ChatOptions chatOptions = new ChatOptions();
-        chatOptions.setTopK(data.getInteger("topK"));
-        chatOptions.setTopP(data.getFloat("topP"));
-        chatOptions.setTemperature(data.getFloat("temperature"));
+        chatOptions.setTopK(data.containsKey("topK") ? data.getInteger("topK") : 10);
+        chatOptions.setTopP(data.containsKey("topP") ? data.getFloat("topP") : 0.8F);
+        chatOptions.setTemperature(data.containsKey("temperature") ? data.getFloat("temperature") : 0.8F);
         llmNode.setChatOptions(chatOptions);
 
         LlmProvider llmProvider = tinyflow.getLlmProvider();
diff --git a/tinyflow-java-demo/src/main/java/com/tinyflow/demo/controller/WorkFlowController.java b/tinyflow-java-demo/src/main/java/com/tinyflow/demo/controller/WorkFlowController.java
index edea0aa0086172accd469863804588439108fff6..45ef8d222559b7f450028c7f2000b6f5e6d7b571 100644
--- a/tinyflow-java-demo/src/main/java/com/tinyflow/demo/controller/WorkFlowController.java
+++ b/tinyflow-java-demo/src/main/java/com/tinyflow/demo/controller/WorkFlowController.java
@@ -1,7 +1,5 @@
 package com.tinyflow.demo.controller;
 
-import com.agentsflex.llm.openai.OpenAILlm;
-import com.agentsflex.llm.openai.OpenAILlmConfig;
 import com.agentsflex.llm.qwen.QwenLlm;
 import com.agentsflex.llm.qwen.QwenLlmConfig;
 import com.alibaba.fastjson.JSONArray;
@@ -48,23 +46,14 @@ public class WorkFlowController {
     public ResponseEntity<Map<String, Object>> exe(@RequestBody JSONObject wf) {
         Tinyflow tinyflow = parseFlowParam(wf.getJSONObject("data").toJSONString());
         Map<String, Object> variables = wf.getJSONObject("param").getInnerMap();
-        Map<String, Object> result = tinyflow.executeForResult(variables);
+        Map<String, Object> result = tinyflow.toChain().executeForResult(variables);
         return new ResponseEntity<>(result, HttpStatus.OK);
     }
 
     private Tinyflow parseFlowParam(String graph) {
         JSONObject json = JSONObject.parseObject(graph);
         JSONArray nodeArr = json.getJSONArray("nodes");
-        for (int i = 0; i < nodeArr.size(); i++) {
-            JSONObject node = nodeArr.getJSONObject(i);
-            if (node.getString("type").equals("llmNode")) {
-                node.getJSONObject("data").put("topK", 10);
-                node.getJSONObject("data").put("topP", 0.8);
-                node.getJSONObject("data").put("temperature", 0.8);
-                node.getJSONObject("data").put("maxTokens", 2048);
-            }
-        }
-        Tinyflow tinyflow = null;
+        Tinyflow tinyflow = new Tinyflow(json.toJSONString());
         for (int i = 0; i < nodeArr.size(); i++) {
             JSONObject node = nodeArr.getJSONObject(i);
             switch (node.getString("type")) {
@@ -74,7 +63,7 @@ public class WorkFlowController {
                     //  千问apikey
                     qwenLlmConfig.setApiKey("sk-xxxxxxxxxxx");
                     qwenLlmConfig.setModel("qwen-plus");
-                    tinyflow = new Tinyflow(id -> new QwenLlm(qwenLlmConfig), json.toJSONString());
+                    tinyflow.setLlmProvider(id -> new QwenLlm(qwenLlmConfig));
                     break;
                 case "zsk":