diff --git a/mirai-core/src/androidMain/kotlin/net/mamoe/mirai/contact/ContactJavaHappyAPI.kt b/mirai-core/src/androidMain/kotlin/net/mamoe/mirai/contact/ContactJavaHappyAPI.kt
index a131fd174..515a87d03 100644
--- a/mirai-core/src/androidMain/kotlin/net/mamoe/mirai/contact/ContactJavaHappyAPI.kt
+++ b/mirai-core/src/androidMain/kotlin/net/mamoe/mirai/contact/ContactJavaHappyAPI.kt
@@ -58,13 +58,13 @@ actual abstract class ContactJavaHappyAPI {
      */
     @Throws(EventCancelledException::class, IllegalStateException::class)
     @JvmName("sendMessage")
-    open fun __sendMessageBlockingForJava__(message: Message) {
-        runBlocking { sendMessage(message) }
+    open fun __sendMessageBlockingForJava__(message: Message): MessageReceipt<Contact> {
+        return runBlocking { sendMessage(message) }
     }
 
     @JvmName("sendMessage")
-    open fun __sendMessageBlockingForJava__(message: String) {
-        runBlocking { sendMessage(message) }
+    open fun __sendMessageBlockingForJava__(message: String): MessageReceipt<Contact> {
+        return runBlocking { sendMessage(message) }
     }
 
     /**
@@ -78,8 +78,8 @@ actual abstract class ContactJavaHappyAPI {
      */
     @Throws(OverFileSizeMaxException::class)
     @JvmName("uploadImage")
-    open fun __uploadImageBlockingForJava__(image: ExternalImage) {
-        runBlocking { uploadImage(image) }
+    open fun __uploadImageBlockingForJava__(image: ExternalImage): Image {
+        return runBlocking { uploadImage(image) }
     }
 
     /**
@@ -88,8 +88,8 @@ actual abstract class ContactJavaHappyAPI {
      */
     @Throws(OverFileSizeMaxException::class)
     @JvmName("uploadImage")
-    open fun __uploadImageBlockingForJava__(image: URL) {
-        runBlocking { uploadImage(image) }
+    open fun __uploadImageBlockingForJava__(image: URL): Image {
+        return runBlocking { uploadImage(image) }
     }
 
     /**
@@ -98,8 +98,8 @@ actual abstract class ContactJavaHappyAPI {
      */
     @Throws(OverFileSizeMaxException::class)
     @JvmName("uploadImage")
-    open fun __uploadImageBlockingForJava__(image: InputStream) {
-        runBlocking { uploadImage(image) }
+    open fun __uploadImageBlockingForJava__(image: InputStream): Image {
+        return runBlocking { uploadImage(image) }
     }
 
     /**
@@ -108,8 +108,8 @@ actual abstract class ContactJavaHappyAPI {
      */
     @Throws(OverFileSizeMaxException::class)
     @JvmName("uploadImage")
-    open fun __uploadImageBlockingForJava__(image: Input) {
-        runBlocking { uploadImage(image) }
+    open fun __uploadImageBlockingForJava__(image: Input): Image {
+        return runBlocking { uploadImage(image) }
     }
 
     /**
@@ -118,8 +118,8 @@ actual abstract class ContactJavaHappyAPI {
      */
     @Throws(OverFileSizeMaxException::class)
     @JvmName("uploadImage")
-    open fun __uploadImageBlockingForJava__(image: File) {
-        runBlocking { uploadImage(image) }
+    open fun __uploadImageBlockingForJava__(image: File): Image {
+        return runBlocking { uploadImage(image) }
     }
 
     /**
@@ -128,8 +128,8 @@ actual abstract class ContactJavaHappyAPI {
      */
     @Throws(OverFileSizeMaxException::class)
     @JvmName("uploadImage")
-    open fun __uploadImageBlockingForJava__(image: Bitmap) {
-        runBlocking { uploadImage(image) }
+    open fun __uploadImageBlockingForJava__(image: Bitmap): Image {
+        return runBlocking { uploadImage(image) }
     }
 
     /**
@@ -236,8 +236,8 @@ actual abstract class MemberJavaHappyAPI : QQ() {
      * @throws PermissionDeniedException 无权限修改时
      */
     @JvmName("mute")
-    open fun __muteBlockingForJava__(durationSeconds: Int) {
-        runBlocking { mute(durationSeconds) }
+    open fun __muteBlockingForJava__(seconds: Int) {
+        return runBlocking { mute(seconds) }
     }
 
     /**
@@ -250,7 +250,7 @@ actual abstract class MemberJavaHappyAPI : QQ() {
      */
     @JvmName("unmute")
     open fun __unmuteBlockingForJava__() {
-        runBlocking { unmute() }
+        return runBlocking { unmute() }
     }
 
     /**
@@ -263,7 +263,7 @@ actual abstract class MemberJavaHappyAPI : QQ() {
      */
     @JvmName("kick")
     open fun __kickBlockingForJava__(message: String) {
-        runBlocking { kick() }
+        return runBlocking { kick() }
     }
 
     /**
@@ -297,8 +297,8 @@ actual abstract class MemberJavaHappyAPI : QQ() {
      * @throws PermissionDeniedException 无权限修改时
      */
     @JvmName("muteAsync")
-    open fun __muteAsyncForJava__(durationSeconds: Int): Future<Unit> {
-        return future { mute(durationSeconds) }
+    open fun __muteAsyncForJava__(seconds: Int): Future<Unit> {
+        return future { mute(seconds) }
     }
 
     /**
diff --git a/mirai-core/src/jvmMain/kotlin/net/mamoe/mirai/contact/ContactJavaHappyAPI.kt b/mirai-core/src/jvmMain/kotlin/net/mamoe/mirai/contact/ContactJavaHappyAPI.kt
index 8f37f7132..e5169ab98 100644
--- a/mirai-core/src/jvmMain/kotlin/net/mamoe/mirai/contact/ContactJavaHappyAPI.kt
+++ b/mirai-core/src/jvmMain/kotlin/net/mamoe/mirai/contact/ContactJavaHappyAPI.kt
@@ -58,13 +58,13 @@ actual abstract class ContactJavaHappyAPI {
      */
     @Throws(EventCancelledException::class, IllegalStateException::class)
     @JvmName("sendMessage")
-    open fun __sendMessageBlockingForJava__(message: Message) {
-        runBlocking { sendMessage(message) }
+    open fun __sendMessageBlockingForJava__(message: Message): MessageReceipt<Contact> {
+        return runBlocking { sendMessage(message) }
     }
 
     @JvmName("sendMessage")
-    open fun __sendMessageBlockingForJava__(message: String) {
-        runBlocking { sendMessage(message) }
+    open fun __sendMessageBlockingForJava__(message: String): MessageReceipt<Contact> {
+        return runBlocking { sendMessage(message) }
     }
 
     /**
@@ -78,8 +78,8 @@ actual abstract class ContactJavaHappyAPI {
      */
     @Throws(OverFileSizeMaxException::class)
     @JvmName("uploadImage")
-    open fun __uploadImageBlockingForJava__(image: ExternalImage) {
-        runBlocking { uploadImage(image) }
+    open fun __uploadImageBlockingForJava__(image: ExternalImage): Image {
+        return runBlocking { uploadImage(image) }
     }
 
     /**
@@ -88,8 +88,8 @@ actual abstract class ContactJavaHappyAPI {
      */
     @Throws(OverFileSizeMaxException::class)
     @JvmName("uploadImage")
-    open fun __uploadImageBlockingForJava__(image: URL) {
-        runBlocking { uploadImage(image) }
+    open fun __uploadImageBlockingForJava__(image: URL): Image {
+        return runBlocking { uploadImage(image) }
     }
 
     /**
@@ -98,8 +98,8 @@ actual abstract class ContactJavaHappyAPI {
      */
     @Throws(OverFileSizeMaxException::class)
     @JvmName("uploadImage")
-    open fun __uploadImageBlockingForJava__(image: InputStream) {
-        runBlocking { uploadImage(image) }
+    open fun __uploadImageBlockingForJava__(image: InputStream): Image {
+        return runBlocking { uploadImage(image) }
     }
 
     /**
@@ -108,8 +108,8 @@ actual abstract class ContactJavaHappyAPI {
      */
     @Throws(OverFileSizeMaxException::class)
     @JvmName("uploadImage")
-    open fun __uploadImageBlockingForJava__(image: Input) {
-        runBlocking { uploadImage(image) }
+    open fun __uploadImageBlockingForJava__(image: Input): Image {
+        return runBlocking { uploadImage(image) }
     }
 
     /**
@@ -118,8 +118,8 @@ actual abstract class ContactJavaHappyAPI {
      */
     @Throws(OverFileSizeMaxException::class)
     @JvmName("uploadImage")
-    open fun __uploadImageBlockingForJava__(image: File) {
-        runBlocking { uploadImage(image) }
+    open fun __uploadImageBlockingForJava__(image: File): Image {
+        return runBlocking { uploadImage(image) }
     }
 
     /**
@@ -128,8 +128,8 @@ actual abstract class ContactJavaHappyAPI {
      */
     @Throws(OverFileSizeMaxException::class)
     @JvmName("uploadImage")
-    open fun __uploadImageBlockingForJava__(image: BufferedImage) {
-        runBlocking { uploadImage(image) }
+    open fun __uploadImageBlockingForJava__(image: BufferedImage): Image {
+        return runBlocking { uploadImage(image) }
     }
 
     /**