diff --git a/config.yaml b/config.yaml
index 9025674..28beb39 100644
--- a/config.yaml
+++ b/config.yaml
@@ -1,2 +1,8 @@
 port: 8080
 upstream_url: "https://api.z.ai/api/anthropic"
+
+models:
+  - id: "glm-4.7"
+    owned_by: "zhipu"
+  - id: "glm-4.6"
+    owned_by: "zhipu"
diff --git a/converter.go b/converter.go
index f82ed72..d7b9bcf 100644
--- a/converter.go
+++ b/converter.go
@@ -53,8 +53,18 @@ func extractSystemMessage(messages []Message) (string, []Message) {
 
 	for _, msg := range messages {
 		if msg.Role == "system" {
-			if content, ok := msg.Content.(string); ok {
+			switch content := msg.Content.(type) {
+			case string:
 				systemParts = append(systemParts, content)
+			case []interface{}:
+				// Extract text from content array
+				for _, part := range content {
+					if partMap, ok := part.(map[string]interface{}); ok {
+						if text, ok := partMap["text"].(string); ok {
+							systemParts = append(systemParts, text)
+						}
+					}
+				}
 			}
 		} else {
 			rest = append(rest, msg)
diff --git a/handler.go b/handler.go
index 63e4b15..4324de8 100644
--- a/handler.go
+++ b/handler.go
@@ -11,10 +11,16 @@ import (
 	"time"
 )
 
+type ModelConfig struct {
+	ID       string `yaml:"id"`
+	OwnedBy  string `yaml:"owned_by"`
+}
+
 // Config holds the application configuration
 type Config struct {
-	Port        int    `yaml:"port"`
-	UpstreamURL string `yaml:"upstream_url"`
+	Port        int            `yaml:"port"`
+	UpstreamURL string         `yaml:"upstream_url"`
+	Models      []ModelConfig   `yaml:"models"`
 }
 
 var config *Config
@@ -56,9 +62,14 @@ func handleModels(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	models := []map[string]interface{}{
-		{"id": "glm-4.7", "object": "model", "created": 1234567890, "owned_by": "zhipu"},
-		{"id": "glm-4.6", "object": "model", "created": 1234567890, "owned_by": "zhipu"},
+	models := make([]map[string]interface{}, len(config.Models))
+	for i, model := range config.Models {
+		models[i] = map[string]interface{}{
+			"id":       model.ID,
+			"object":   "model",
+			"created":  1234567890,
+			"owned_by": model.OwnedBy,
+		}
 	}
 
 	response := map[string]interface{}{
@@ -117,7 +128,7 @@ func handleChatCompletions(w http.ResponseWriter, r *http.Request) {
 	anthropicReq.Stream = false
 
 	reqBody, _ := json.Marshal(anthropicReq)
-	log.Printf("[debug] Sending to upstream %s, model=%s, body=%s", config.UpstreamURL, req.Model, string(reqBody))
+	log.Printf("[debug] Sending to upstream %s, model=%s, body_size=%d bytes", config.UpstreamURL, req.Model, len(reqBody))
 
 	// Non-streaming request to upstream
 	upstreamResp, err := callUpstream(anthropicReq, apiKey, sessionID)
@@ -129,7 +140,7 @@ func handleChatCompletions(w http.ResponseWriter, r *http.Request) {
 
 	if upstreamResp.StatusCode != http.StatusOK {
 		respBody, _ := io.ReadAll(upstreamResp.Body)
-		log.Printf("[debug] Upstream error status %d: %s", upstreamResp.StatusCode, string(respBody))
+		log.Printf("[debug] Upstream error status %d, body_size=%d bytes", upstreamResp.StatusCode, len(respBody))
 		writeError(w, http.StatusBadGateway, fmt.Sprintf("Upstream returned error: %s", string(respBody)), "upstream_error", fmt.Sprintf("status_%d", upstreamResp.StatusCode))
 		return
 	}
@@ -140,7 +151,7 @@ func handleChatCompletions(w http.ResponseWriter, r *http.Request) {
 		writeError(w, http.StatusBadGateway, "Failed to read upstream response", "upstream_error", "body_read_error")
 		return
 	}
-	log.Printf("[debug] Upstream response: %s", string(respBody))
+	log.Printf("[debug] Upstream response received, body_size=%d bytes", len(respBody))
 
 	var anthropicResp AnthropicResponse
 	if err := json.Unmarshal(respBody, &anthropicResp); err != nil {
diff --git a/main.go b/main.go
index 69f422c..8149af5 100644
--- a/main.go
+++ b/main.go
@@ -6,6 +6,9 @@ import (
 	"log"
 	"net/http"
 	"os"
+	"os/signal"
+	"syscall"
+	"time"
 
 	"github.com/google/uuid"
 	"gopkg.in/yaml.v3"
@@ -38,10 +41,28 @@ func main() {
 	})
 
 	addr := fmt.Sprintf(":%d", config.Port)
-	log.Printf("Starting proxx on %s, upstream: %s", addr, config.UpstreamURL)
-	if err := http.ListenAndServe(addr, nil); err != nil {
-		log.Fatalf("Server failed: %v", err)
+	
+	server := &http.Server{Addr: addr}
+	
+	go func() {
+		log.Printf("Starting proxx on %s, upstream: %s", addr, config.UpstreamURL)
+		if err := server.ListenAndServe(); err != nil && err != http.ErrServerClosed {
+			log.Fatalf("Server failed: %v", err)
+		}
+	}()
+	
+	// Wait for interrupt signal
+	sigChan := make(chan os.Signal, 1)
+	signal.Notify(sigChan, syscall.SIGINT, syscall.SIGTERM)
+	<-sigChan
+	
+	log.Println("Shutting down server...")
+	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
+	defer cancel()
+	if err := server.Shutdown(ctx); err != nil {
+		log.Printf("Server shutdown error: %v", err)
 	}
+	log.Println("Server stopped")
 }
 
 // contextKey is a custom type for context keys
diff --git a/proxx b/proxx
index 62b35b4..93268a2 100755
Binary files a/proxx and b/proxx differ