diff --git a/app/src/main/java/io/legado/app/ui/main/MainActivity.kt b/app/src/main/java/io/legado/app/ui/main/MainActivity.kt
index 38569115b..8b4705ae0 100644
--- a/app/src/main/java/io/legado/app/ui/main/MainActivity.kt
+++ b/app/src/main/java/io/legado/app/ui/main/MainActivity.kt
@@ -7,7 +7,6 @@ import androidx.fragment.app.Fragment
 import androidx.fragment.app.FragmentManager
 import androidx.fragment.app.FragmentStatePagerAdapter
 import androidx.viewpager.widget.ViewPager
-import com.github.houbb.opencc4j.util.ZhConverterUtil
 import com.google.android.material.bottomnavigation.BottomNavigationView
 import io.legado.app.App
 import io.legado.app.BuildConfig
@@ -16,7 +15,6 @@ import io.legado.app.base.VMBaseActivity
 import io.legado.app.constant.EventBus
 import io.legado.app.constant.PreferKey
 import io.legado.app.help.AppConfig
-import io.legado.app.help.coroutine.Coroutine
 import io.legado.app.help.storage.Backup
 import io.legado.app.lib.theme.ATH
 import io.legado.app.service.BaseReadAloudService
@@ -53,21 +51,12 @@ class MainActivity : VMBaseActivity<MainViewModel>(R.layout.activity_main),
     override fun onPostCreate(savedInstanceState: Bundle?) {
         super.onPostCreate(savedInstanceState)
         upVersion()
-        //初始化简繁转换引擎
-        when (AppConfig.chineseConverterType) {
-            1 -> Coroutine.async { ZhConverterUtil.toSimple("初始化") }
-            2 -> Coroutine.async { ZhConverterUtil.toTraditional("初始化") }
-        }
         //自动更新书籍
         if (AppConfig.autoRefreshBook) {
             view_pager_main.postDelayed({
                 viewModel.upChapterList()
             }, 1000)
         }
-        //清楚过期数据
-        view_pager_main.postDelayed({
-            viewModel.clearExpiredData()
-        }, 3000)
     }
 
     override fun onNavigationItemSelected(item: MenuItem): Boolean {
diff --git a/app/src/main/java/io/legado/app/ui/main/MainViewModel.kt b/app/src/main/java/io/legado/app/ui/main/MainViewModel.kt
index 1a0652bae..4fe57d758 100644
--- a/app/src/main/java/io/legado/app/ui/main/MainViewModel.kt
+++ b/app/src/main/java/io/legado/app/ui/main/MainViewModel.kt
@@ -13,7 +13,6 @@ import io.legado.app.utils.fromJsonObject
 import io.legado.app.utils.postEvent
 import kotlinx.coroutines.Dispatchers.IO
 import kotlinx.coroutines.delay
-import java.util.concurrent.TimeUnit
 
 class MainViewModel(application: Application) : BaseViewModel(application) {
     val updateList = hashSetOf<String>()
@@ -54,13 +53,6 @@ class MainViewModel(application: Application) : BaseViewModel(application) {
         }
     }
 
-    fun clearExpiredData() {
-        execute {
-            App.db.searchBookDao()
-                .clearExpired(System.currentTimeMillis() - TimeUnit.DAYS.toMillis(1))
-        }
-    }
-
     fun initRss() {
         execute {
             val url = "https://gitee.com/alanskycn/yuedu/raw/master/JS/RSS/rssSource"
diff --git a/app/src/main/java/io/legado/app/ui/welcome/WelcomeActivity.kt b/app/src/main/java/io/legado/app/ui/welcome/WelcomeActivity.kt
index 44054f192..22e694b0f 100644
--- a/app/src/main/java/io/legado/app/ui/welcome/WelcomeActivity.kt
+++ b/app/src/main/java/io/legado/app/ui/welcome/WelcomeActivity.kt
@@ -2,14 +2,19 @@ package io.legado.app.ui.welcome
 
 import android.content.Intent
 import android.os.Bundle
+import com.github.houbb.opencc4j.util.ZhConverterUtil
+import io.legado.app.App
 import io.legado.app.R
 import io.legado.app.base.BaseActivity
+import io.legado.app.help.AppConfig
+import io.legado.app.help.coroutine.Coroutine
 import io.legado.app.lib.theme.accentColor
 import io.legado.app.ui.book.read.ReadBookActivity
 import io.legado.app.ui.main.MainActivity
 import io.legado.app.utils.getPrefBoolean
 import kotlinx.android.synthetic.main.activity_welcome.*
 import org.jetbrains.anko.startActivity
+import java.util.concurrent.TimeUnit
 
 open class WelcomeActivity : BaseActivity(R.layout.activity_welcome) {
 
@@ -20,6 +25,17 @@ open class WelcomeActivity : BaseActivity(R.layout.activity_welcome) {
             finish()
             return
         }
+        Coroutine.async {
+            //清楚过期数据
+            App.db.searchBookDao()
+                .clearExpired(System.currentTimeMillis() - TimeUnit.DAYS.toMillis(1))
+            //初始化简繁转换引擎
+            when (AppConfig.chineseConverterType) {
+                1 -> ZhConverterUtil.toSimple("初始化")
+                2 -> ZhConverterUtil.toTraditional("初始化")
+                else -> null
+            }
+        }
         root_view.postDelayed({
             startActivity<MainActivity>()
             if (getPrefBoolean(getString(R.string.pk_default_read))) {