diff --git a/.idea/vcs.xml b/.idea/vcs.xml
new file mode 100644
index 0000000..9661ac7
--- /dev/null
+++ b/.idea/vcs.xml
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="$PROJECT_DIR$" vcs="Git" />
+  </component>
+</project>
\ No newline at end of file
diff --git a/app/build.gradle b/app/build.gradle
index 6864d8f..f03097f 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -53,6 +53,7 @@ dependencies {
     implementation 'com.google.android.material:material:1.4.0'
     implementation "androidx.compose.ui:ui:$compose_version"
     implementation "androidx.compose.material:material:$compose_version"
+    implementation "androidx.compose.material:material-icons-extended:$compose_version"
     implementation "androidx.compose.ui:ui-tooling-preview:$compose_version"
     implementation "androidx.navigation:navigation-compose:$nav_compose_version"
     implementation 'androidx.lifecycle:lifecycle-runtime-ktx:2.4.0'
diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index b7fea51..564250e 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -2,6 +2,8 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     package="net.blumia.pcmdroid">
 
+    <uses-permission android:name="android.permission.INTERNET"/>
+
     <application
         android:allowBackup="true"
         android:icon="@mipmap/ic_launcher"
diff --git a/app/src/main/java/net/blumia/pcmdroid/MainActivity.kt b/app/src/main/java/net/blumia/pcmdroid/MainActivity.kt
index 4e4f4fc..dbd532e 100644
--- a/app/src/main/java/net/blumia/pcmdroid/MainActivity.kt
+++ b/app/src/main/java/net/blumia/pcmdroid/MainActivity.kt
@@ -3,6 +3,7 @@ package net.blumia.pcmdroid
 import android.os.Bundle
 import androidx.activity.ComponentActivity
 import androidx.activity.compose.setContent
+import androidx.activity.viewModels
 import androidx.compose.material.MaterialTheme
 import androidx.compose.material.Surface
 import androidx.compose.material.Text
@@ -13,28 +14,18 @@ import net.blumia.pcmdroid.ui.screen.main.MainPlayer
 import net.blumia.pcmdroid.ui.theme.PrivateCloudMusicTheme
 
 class MainActivity : ComponentActivity() {
+
+    private val model: MainViewModel by viewModels()
+
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         setContent {
             PrivateCloudMusicTheme {
                 // A surface container using the 'background' color from the theme
                 Surface(color = MaterialTheme.colors.background) {
-                    NavGraph()
+                    NavGraph(model)
                 }
             }
         }
     }
-}
-
-@Composable
-fun Greeting(name: String) {
-    Text(text = "Hello $name!")
-}
-
-@Preview(showBackground = true)
-@Composable
-fun DefaultPreview() {
-    PrivateCloudMusicTheme {
-        Greeting("Android")
-    }
 }
\ No newline at end of file
diff --git a/app/src/main/java/net/blumia/pcmdroid/MainViewModel.kt b/app/src/main/java/net/blumia/pcmdroid/MainViewModel.kt
new file mode 100644
index 0000000..64cec9c
--- /dev/null
+++ b/app/src/main/java/net/blumia/pcmdroid/MainViewModel.kt
@@ -0,0 +1,63 @@
+package net.blumia.pcmdroid
+
+import android.net.Uri
+import androidx.lifecycle.LiveData
+import androidx.lifecycle.MutableLiveData
+import androidx.lifecycle.ViewModel
+import net.blumia.pcmdroid.model.Folder
+import net.blumia.pcmdroid.model.Server
+import net.blumia.pcmdroid.model.Song
+
+class MainViewModel : ViewModel() {
+
+    val servers: LiveData<List<Server>> = MutableLiveData<List<Server>>(
+        listOf(
+            Server(
+                url = Uri.parse("https://localhost/api.php"),
+                name = "PCM",
+                baseFolderName = "pcm",
+            ),
+            Server(
+                url = Uri.parse("https://localhost/api.php"),
+                name = "PCM2",
+                baseFolderName = "pcm2",
+            )
+        )
+    )
+
+    val currentPath: LiveData<String> = MutableLiveData("")
+
+    val drawerFolders: LiveData<List<Folder>> = MutableLiveData(
+        listOf(
+            Folder("Test/"),
+            Folder("Folder/")
+        )
+    )
+
+    val folders: LiveData<List<Folder>> = MutableLiveData(
+        listOf(
+            Folder("Test/Converted-Modules/")
+        )
+    )
+
+    val songs: LiveData<List<Song>> = MutableLiveData(
+        listOf(
+            Song(
+                filePath = "Test/Rick Astley - Never Gonna Give You Up.mp3",
+                url = Uri.parse("http://localhost/rickroll.mp3")
+            ),
+            Song(
+                filePath = "Test/哇 好东西一堆.xm",
+                url = Uri.parse("http://localhost/rickroll.mp3")
+            )
+        )
+    )
+
+    fun fetchServer(srv: Server) {
+        //
+    }
+
+    fun fetchFolder(folder: Folder) {
+        //
+    }
+}
\ No newline at end of file
diff --git a/app/src/main/java/net/blumia/pcmdroid/model/Server.kt b/app/src/main/java/net/blumia/pcmdroid/model/Server.kt
index 1896f43..569970b 100644
--- a/app/src/main/java/net/blumia/pcmdroid/model/Server.kt
+++ b/app/src/main/java/net/blumia/pcmdroid/model/Server.kt
@@ -6,4 +6,4 @@ data class Server (
     val url: Uri,
     val name: String,
     val baseFolderName: String,
-)
\ No newline at end of file
+)
diff --git a/app/src/main/java/net/blumia/pcmdroid/model/Song.kt b/app/src/main/java/net/blumia/pcmdroid/model/Song.kt
new file mode 100644
index 0000000..868eee0
--- /dev/null
+++ b/app/src/main/java/net/blumia/pcmdroid/model/Song.kt
@@ -0,0 +1,23 @@
+package net.blumia.pcmdroid.model
+
+import android.net.Uri
+
+data class Song (
+    val filePath: String, // with file name
+    val modifiedTime: Int = 0,
+    val fileSize: Int = 0,
+    val additionalInfo: Boolean = false, // if sidecar meta-info json file exist.
+    val url: Uri,
+) {
+    fun displayName(): String {
+        return Uri.parse(filePath).lastPathSegment ?: "???"
+    }
+}
+
+data class Folder (
+    val folderPath: String,
+) {
+    fun displayName(): String {
+        return Uri.parse(folderPath).lastPathSegment ?: "???"
+    }
+}
\ No newline at end of file
diff --git a/app/src/main/java/net/blumia/pcmdroid/repository/ServerRepository.kt b/app/src/main/java/net/blumia/pcmdroid/repository/ServerRepository.kt
new file mode 100644
index 0000000..abe395e
--- /dev/null
+++ b/app/src/main/java/net/blumia/pcmdroid/repository/ServerRepository.kt
@@ -0,0 +1,4 @@
+package net.blumia.pcmdroid.repository
+
+class ServerRepository {
+}
\ No newline at end of file
diff --git a/app/src/main/java/net/blumia/pcmdroid/ui/NavGraph.kt b/app/src/main/java/net/blumia/pcmdroid/ui/NavGraph.kt
index f6ac492..38b710c 100644
--- a/app/src/main/java/net/blumia/pcmdroid/ui/NavGraph.kt
+++ b/app/src/main/java/net/blumia/pcmdroid/ui/NavGraph.kt
@@ -1,11 +1,11 @@
 package net.blumia.pcmdroid.ui
 
 import androidx.compose.runtime.Composable
-import androidx.compose.ui.Modifier
 import androidx.navigation.NavHostController
 import androidx.navigation.compose.NavHost
 import androidx.navigation.compose.composable
 import androidx.navigation.compose.rememberNavController
+import net.blumia.pcmdroid.MainViewModel
 import net.blumia.pcmdroid.ui.screen.addserver.AddServerScreen
 import net.blumia.pcmdroid.ui.screen.main.MainPlayer
 import net.blumia.pcmdroid.ui.screen.settings.SettingsScreen
@@ -18,6 +18,7 @@ object MainDestinations {
 
 @Composable
 fun NavGraph(
+    viewModel: MainViewModel,
     navController: NavHostController = rememberNavController(),
     startDestination: String = MainDestinations.MAIN_ROUTE,
 ) {
@@ -27,6 +28,7 @@ fun NavGraph(
     ) {
         composable(MainDestinations.MAIN_ROUTE) {
             MainPlayer(
+                viewModel = viewModel,
                 addServerActionTriggered = {
                     navController.navigate(MainDestinations.ADD_SERVER_ROUTE)
                 },
diff --git a/app/src/main/java/net/blumia/pcmdroid/ui/screen/main/MainPlayer.kt b/app/src/main/java/net/blumia/pcmdroid/ui/screen/main/MainPlayer.kt
index 99cc6a0..0a72826 100644
--- a/app/src/main/java/net/blumia/pcmdroid/ui/screen/main/MainPlayer.kt
+++ b/app/src/main/java/net/blumia/pcmdroid/ui/screen/main/MainPlayer.kt
@@ -1,50 +1,72 @@
 package net.blumia.pcmdroid.ui.screen.main
 
+import android.net.Uri
 import androidx.compose.foundation.Image
+import androidx.compose.foundation.clickable
+import androidx.compose.foundation.gestures.scrollable
+import androidx.compose.foundation.horizontalScroll
 import androidx.compose.foundation.layout.*
+import androidx.compose.foundation.rememberScrollState
 import androidx.compose.material.*
 import androidx.compose.material.icons.Icons
 import androidx.compose.material.icons.filled.*
+import androidx.compose.material.icons.rounded.FeaturedPlayList
 import androidx.compose.material.icons.rounded.PlayArrow
+import androidx.compose.material.icons.rounded.PlayCircle
+import androidx.compose.material.icons.rounded.PlayCircleOutline
 import androidx.compose.runtime.*
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.graphics.vector.ImageVector
+import androidx.compose.ui.layout.VerticalAlignmentLine
 import androidx.compose.ui.res.painterResource
+import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.tooling.preview.Preview
 import androidx.compose.ui.unit.dp
 import kotlinx.coroutines.launch
+import net.blumia.pcmdroid.MainViewModel
 import net.blumia.pcmdroid.R
+import net.blumia.pcmdroid.model.Folder
+import net.blumia.pcmdroid.model.Server
+import net.blumia.pcmdroid.model.Song
 
 @Preview(showBackground = true)
 @OptIn(ExperimentalMaterialApi::class)
 @Composable
 fun NowPlaying() {
-    Row(
+    Column(
         modifier = Modifier
-            .fillMaxWidth()
-            .height(56.dp),
-        verticalAlignment = Alignment.CenterVertically,
+            .fillMaxWidth(),
     ) {
-        Image(
-            painter = painterResource(id = R.drawable.ic_launcher_background),
-            contentDescription = "Album cover",
+        LinearProgressIndicator(
+            modifier = Modifier.fillMaxWidth(),
+            progress = 0f,
         )
 
-        ListItem(
-            text = {
-                Text(
-                    text = "Not playing at all.",
-                )
-            },
-            trailing = {
-                IconButton(onClick = { /*TODO*/ }) {
-                    Icon(imageVector = Icons.Rounded.PlayArrow, contentDescription = "Menu")
+        Row(
+            modifier = Modifier
+                .fillMaxWidth()
+                .height(56.dp),
+            verticalAlignment = Alignment.CenterVertically,
+        ) {
+            Image(
+                painter = painterResource(id = R.drawable.ic_launcher_background),
+                contentDescription = "Album cover",
+            )
+
+            ListItem(
+                text = {
+                    Text(
+                        text = "Not playing at all.",
+                    )
+                },
+                trailing = {
+                    IconButton(onClick = { /*TODO*/ }) {
+                        Icon(imageVector = Icons.Rounded.PlayCircleOutline, contentDescription = "Menu")
+                    }
                 }
-            }
-        )
-
-
+            )
+        }
     }
 }
 
@@ -52,32 +74,34 @@ fun NowPlaying() {
 @OptIn(ExperimentalMaterialApi::class)
 @Composable
 fun DrawerContent(
+    viewModel: MainViewModel = MainViewModel(),
     addServerActionTriggered: () -> Unit = {},
     settingsActionTriggered: () -> Unit = {},
 ) {
     Row(modifier = Modifier.fillMaxSize()) {
-        var selectedItem by remember { mutableStateOf<Int?>(null) }
-        val items = listOf<String>()
-        val icons = listOf<ImageVector>()
+        var selectedItem by remember { mutableStateOf<Int?>(0) }
+        val servers = viewModel.servers.value
         NavigationRail {
-            items.forEachIndexed { index, item ->
+            servers?.forEachIndexed { index, server ->
                 NavigationRailItem(
                     icon = {
                         Icon(
-                            icons[index], item
+                            Icons.Filled.LibraryMusic, server.name
                         )
                     },
                     label = {
-                        Text(item)
+                        Text(server.name)
                     },
                     selected = selectedItem == index,
-                    onClick = { /*TODO*/ }
+                    onClick = {
+                        viewModel.fetchServer(server)
+                    }
                 )
             }
 
             NavigationRailItem(
                 icon = { Icon(Icons.Filled.AddCircle, null) },
-                label = { Text("Add") },
+                label = { Text(stringResource(id = R.string.add)) },
                 selected = false,
                 onClick = addServerActionTriggered,
             )
@@ -86,7 +110,7 @@ fun DrawerContent(
 
             NavigationRailItem(
                 icon = { Icon(Icons.Filled.Settings, null) },
-                label = { Text("Settings") },
+                label = { Text(stringResource(id = R.string.settings)) },
                 selected = false,
                 onClick = settingsActionTriggered,
             )
@@ -108,13 +132,30 @@ fun DrawerContent(
             )
 
             Divider()
+
+            val drawerFolders = viewModel.drawerFolders.value
+            drawerFolders?.forEach { folder ->
+                ListItem(
+                    modifier = Modifier.clickable{
+                        viewModel.fetchFolder(folder)
+                    },
+                    text = {
+                        Text(
+                            text = folder.displayName(),
+                            style = MaterialTheme.typography.subtitle1
+                        )
+                    }
+                )
+            }
         }
     }
 }
 
 @Preview(showBackground = true)
+@OptIn(ExperimentalMaterialApi::class)
 @Composable
 fun MainPlayer(
+    viewModel: MainViewModel = MainViewModel(),
     addServerActionTriggered: () -> Unit = {},
     settingsActionTriggered: () -> Unit = {},
 ) {
@@ -124,6 +165,7 @@ fun MainPlayer(
         drawerState = drawerState,
         drawerContent = {
             DrawerContent(
+                viewModel = viewModel,
                 addServerActionTriggered = addServerActionTriggered,
                 settingsActionTriggered = settingsActionTriggered,
             )
@@ -132,7 +174,7 @@ fun MainPlayer(
         Scaffold(
             topBar = {
                 TopAppBar(
-                    title = { Text("Private Cloud Music") },
+                    title = { Text(stringResource(id = R.string.app_name)) },
                     navigationIcon = {
                         IconButton(onClick = {
                             drawerScope.launch {
@@ -154,7 +196,68 @@ fun MainPlayer(
                 modifier = Modifier.fillMaxSize()
             ) {
                 Column(modifier = Modifier.weight(1f, fill = true)) {
-                    //
+
+                    val iconLeftPadding = 16.dp
+                    val iconVerticalPadding = 12.dp
+                    Row(
+                        modifier = Modifier
+                            .fillMaxWidth()
+                            .horizontalScroll(rememberScrollState())
+                            .padding(
+                                horizontal = iconLeftPadding,
+                                vertical = iconVerticalPadding,
+                            ),
+                        verticalAlignment = Alignment.CenterVertically,
+                    ) {
+                        val pathSeg = listOf("Deep", "Dark", "Folder")
+                        pathSeg.forEach { seg ->
+                            val isLastSeg = seg == pathSeg.last()
+
+                            Text(
+                                text = seg,
+                                style = MaterialTheme.typography.body1,
+                                color = if (isLastSeg) MaterialTheme.colors.primary else MaterialTheme.colors.onSurface
+                            )
+
+                            if (!isLastSeg) {
+                                Icon(
+                                    modifier = Modifier.padding(horizontal = 5.dp),
+                                    imageVector = Icons.Filled.NavigateNext,
+                                    contentDescription = null,
+                                )
+                            }
+                        }
+                    }
+
+                    viewModel.folders.value?.forEach { folder ->
+                        ListItem(
+                            modifier = Modifier.clickable {  },
+                            icon = {
+                                Icon(
+                                    imageVector = Icons.Filled.FolderOpen,
+                                    contentDescription = null,
+                                )
+                            },
+                            text = {
+                                Text(folder.displayName())
+                            }
+                        )
+                    }
+
+                    viewModel.songs.value?.forEach { song ->
+                        ListItem(
+                            modifier = Modifier.clickable {  },
+                            icon = {
+                                Icon(
+                                    imageVector = Icons.Filled.MusicNote,
+                                    contentDescription = null
+                                )
+                            },
+                            text = {
+                                Text(song.displayName())
+                            }
+                        )
+                    }
                 }
                 NowPlaying()
             }
diff --git a/app/src/main/res/values-zh/strings.xml b/app/src/main/res/values-zh/strings.xml
new file mode 100644
index 0000000..3a438ee
--- /dev/null
+++ b/app/src/main/res/values-zh/strings.xml
@@ -0,0 +1,5 @@
+<resources>
+    <string name="app_name">私有云音乐</string>
+    <string name="settings">设置</string>
+    <string name="add">添加</string>
+</resources>
\ No newline at end of file
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index a8912f9..9efca95 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -1,3 +1,5 @@
 <resources>
     <string name="app_name">Private Cloud Music</string>
+    <string name="settings">Settings</string>
+    <string name="add">Add</string>
 </resources>
\ No newline at end of file