diff --git a/Netease-sync/server.js b/Netease-sync/server.js
index d6f5c17..a6c72d5 100644
--- a/Netease-sync/server.js
+++ b/Netease-sync/server.js
@@ -131,9 +131,19 @@ async function getSubsonicUrl(endpoint, params = {}) {
         ...params
     };
     
-    const queryString = Object.entries(authParams)
-        .map(([key, value]) => `${key}=${encodeURIComponent(value)}`)
-        .join('&');
+    const queryParts = [];
+    for (const [key, value] of Object.entries(authParams)) {
+        if (Array.isArray(value)) {
+            for (const item of value) {
+                if (item !== undefined && item !== null && item !== '') {
+                    queryParts.push(`${key}=${encodeURIComponent(item)}`);
+                }
+            }
+        } else if (value !== undefined && value !== null && value !== '') {
+            queryParts.push(`${key}=${encodeURIComponent(value)}`);
+        }
+    }
+    const queryString = queryParts.join('&');
     
     return `${NAVIDROME_URL}/rest/${endpoint}?${queryString}`;
 }
@@ -517,7 +527,7 @@ async function createNavidromePlaylist(name, songIds = []) {
     try {
         const result = await callSubsonicAPI('createPlaylist', {
             name: name,
-            songId: songIds.join(',')
+            songId: songIds
         });
         return result.playlist?.id;
     } catch (error) {
@@ -528,9 +538,10 @@ async function createNavidromePlaylist(name, songIds = []) {
 
 async function updateNavidromePlaylist(playlistId, songIdsToAdd) {
     try {
+        console.log(`[Sync] Updating Navidrome playlist ${playlistId} with ${songIdsToAdd.length} songs`);
         await callSubsonicAPI('updatePlaylist', {
             playlistId: playlistId,
-            songIdToAdd: songIdsToAdd.join(',')
+            songIdToAdd: songIdsToAdd
         });
     } catch (error) {
         console.error('Update playlist error:', error.message);