diff --git a/src/main/java/com/company/agentfoundation/integration/coze/client/CozeWorkflowClient.java b/src/main/java/com/company/agentfoundation/integration/coze/client/CozeWorkflowClient.java
index 9f1f786..43ee28a 100644
--- a/src/main/java/com/company/agentfoundation/integration/coze/client/CozeWorkflowClient.java
+++ b/src/main/java/com/company/agentfoundation/integration/coze/client/CozeWorkflowClient.java
@@ -2,7 +2,6 @@ package com.company.agentfoundation.integration.coze.client;
 
 import com.company.agentfoundation.config.FoundationProperties;
 import com.company.agentfoundation.integration.coze.dto.CozeWorkflowRequest;
-import com.fasterxml.jackson.databind.JsonNode;
 import org.springframework.http.HttpHeaders;
 import org.springframework.http.MediaType;
 import org.springframework.stereotype.Component;
@@ -23,13 +22,13 @@ public class CozeWorkflowClient {
         .build();
   }
 
-  public JsonNode chat(CozeWorkflowRequest request) {
+  public String chat(CozeWorkflowRequest request) {
     return webClient.post()
         .uri(properties.getCoze().getChatPath())
         .header(HttpHeaders.AUTHORIZATION, "Bearer " + properties.getCoze().getApiKey())
         .bodyValue(request)
         .retrieve()
-        .bodyToMono(JsonNode.class)
+        .bodyToMono(String.class)
         .retryWhen(Retry.backoff(properties.getCoze().getMaxRetries(), Duration.ofMillis(300)))
         .block(Duration.ofMillis(properties.getCoze().getReadTimeoutMs()));
   }
diff --git a/src/main/java/com/company/agentfoundation/integration/coze/service/CozeWorkflowService.java b/src/main/java/com/company/agentfoundation/integration/coze/service/CozeWorkflowService.java
index 162f05c..2aae5ef 100644
--- a/src/main/java/com/company/agentfoundation/integration/coze/service/CozeWorkflowService.java
+++ b/src/main/java/com/company/agentfoundation/integration/coze/service/CozeWorkflowService.java
@@ -55,7 +55,7 @@ public class CozeWorkflowService {
         List.of(new CozeMessage("text", "user", "question", userText == null ? "" : userText))
     );
 
-    JsonNode response = client.chat(request);
+    String response = client.chat(request);
     String reply = extractReply(response).orElse("");
     log.info("coze workflow chat success workflowKey={} replyPreview={}", workflowKey, preview(reply));
     return reply;
@@ -117,6 +117,76 @@ public class CozeWorkflowService {
     return Optional.empty();
   }
 
+  private Optional<String> extractReply(String response) {
+    if (isBlank(response)) {
+      return Optional.empty();
+    }
+    String trimmed = response.trim();
+    if (isJson(trimmed)) {
+      try {
+        return extractReply(objectMapper.readTree(trimmed));
+      } catch (Exception e) {
+        log.warn("coze workflow json response parse failed err={}", e.getMessage());
+      }
+    }
+    Optional<String> eventReply = extractFromEventStream(trimmed);
+    if (eventReply.isPresent()) {
+      return eventReply;
+    }
+    if (looksLikeEventStream(trimmed)) {
+      log.warn("coze workflow event stream response did not include completed content");
+      return Optional.empty();
+    }
+    return Optional.of(trimmed);
+  }
+
+  private Optional<String> extractFromEventStream(String response) {
+    String currentEvent = "";
+    StringBuilder data = new StringBuilder();
+    String[] lines = response.replace("\r\n", "\n").replace('\r', '\n').split("\n", -1);
+    for (String line : lines) {
+      if (line.isBlank()) {
+        Optional<String> content = extractCompletedEventContent(currentEvent, data.toString());
+        if (content.isPresent()) {
+          return content;
+        }
+        currentEvent = "";
+        data.setLength(0);
+        continue;
+      }
+      if (line.startsWith("event:")) {
+        currentEvent = line.substring("event:".length()).trim();
+      } else if (line.startsWith("data:")) {
+        if (data.length() > 0) {
+          data.append('\n');
+        }
+        data.append(line.substring("data:".length()).trim());
+      }
+    }
+    return extractCompletedEventContent(currentEvent, data.toString());
+  }
+
+  private Optional<String> extractCompletedEventContent(String event, String data) {
+    if (!"conversation.message.completed".equals(event) || isBlank(data) || !isJson(data.trim())) {
+      return Optional.empty();
+    }
+    try {
+      JsonNode message = objectMapper.readTree(data);
+      String role = message.path("role").asText("");
+      String type = message.path("type").asText("");
+      if (("assistant".equalsIgnoreCase(role) || role.isBlank()) && ("answer".equalsIgnoreCase(type) || type.isBlank())) {
+        return firstText(message, "content", "text", "answer", "output");
+      }
+    } catch (Exception e) {
+      log.warn("coze workflow completed event parse failed err={}", e.getMessage());
+    }
+    return Optional.empty();
+  }
+
+  private boolean looksLikeEventStream(String response) {
+    return response.startsWith("event:") || response.contains("\nevent:") || response.startsWith("data:") || response.contains("\ndata:");
+  }
+
   private Optional<String> extractFromMessages(JsonNode messages) {
     if (messages == null || !messages.isArray()) {
       return Optional.empty();
diff --git a/src/main/java/com/company/agentfoundation/integration/wecom/controller/WecomCallbackController.java b/src/main/java/com/company/agentfoundation/integration/wecom/controller/WecomCallbackController.java
index 8ab4641..bfe6606 100644
--- a/src/main/java/com/company/agentfoundation/integration/wecom/controller/WecomCallbackController.java
+++ b/src/main/java/com/company/agentfoundation/integration/wecom/controller/WecomCallbackController.java
@@ -26,7 +26,7 @@ import java.util.concurrent.ConcurrentHashMap;
 public class WecomCallbackController {
   private static final Logger log = LoggerFactory.getLogger(WecomCallbackController.class);
   private static final long MESSAGE_DEDUP_TTL_SECONDS = 600;
-  private static final String FIXED_REPLY = "\u4f60\u597d";
+  private static final String ERROR_REPLY = "\u6263\u5b50\u667a\u80fd\u4f53\u8c03\u7528\u5931\u8d25\uff0c\u8bf7\u7a0d\u540e\u91cd\u8bd5";
   private final CozeWorkflowService cozeWorkflowService;
   private final WecomClient wecomClient;
   private final WecomCryptoService wecomCryptoService;
@@ -97,11 +97,11 @@ public class WecomCallbackController {
       reply = cozeWorkflowService.chatDefault(userText);
     } catch (Exception e) {
       log.error("wecom callback coze workflow failed fromUser={} err={}", msg.getFromUserName(), e.getMessage(), e);
-      reply = FIXED_REPLY;
+      reply = ERROR_REPLY;
     }
     if (reply == null || reply.isBlank()) {
-      log.warn("wecom callback coze reply blank, fallback to fixed reply");
-      reply = FIXED_REPLY;
+      log.warn("wecom callback coze reply blank, fallback to error reply");
+      reply = ERROR_REPLY;
     }
     log.info("wecom callback sending coze reply toUser={} replyPreview={}", msg.getFromUserName(), preview(reply));
     wecomClient.sendText(msg.getFromUserName(), reply);