diff --git a/README.md b/README.md
index 7139d63bb..8a6331880 100644
--- a/README.md
+++ b/README.md
@@ -65,6 +65,6 @@ Simple tests under src/test directory
 - [mman-win32](https://github.com/mcgarrah/mman-win32)
 
 ### One-time Donation
-We accept donations via the following ways:
+We accept donations via WeChatPay:
 
-![WeChat Pay](assets/wx.jpg)
+![WeChat Pay](assets/wx.png)
diff --git a/assets/wx.jpg b/assets/wx.jpg
deleted file mode 100644
index 3540d728e..000000000
Binary files a/assets/wx.jpg and /dev/null differ
diff --git a/assets/wx.png b/assets/wx.png
new file mode 100644
index 000000000..d37ab6b82
Binary files /dev/null and b/assets/wx.png differ
diff --git a/backend/dynarmic/pom.xml b/backend/dynarmic/pom.xml
index 7d6614ee1..1f6b6c713 100644
--- a/backend/dynarmic/pom.xml
+++ b/backend/dynarmic/pom.xml
@@ -5,18 +5,18 @@
     <parent>
         <groupId>com.github.zhkl0228</groupId>
         <artifactId>unidbg-parent</artifactId>
-        <version>0.9.4</version>
+        <version>0.9.5-SNAPSHOT</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
     <modelVersion>4.0.0</modelVersion>
 
     <artifactId>unidbg-dynarmic</artifactId>
-    <version>0.9.4</version>
+    <version>0.9.5-SNAPSHOT</version>
     <dependencies>
         <dependency>
             <groupId>com.github.zhkl0228</groupId>
             <artifactId>unidbg-api</artifactId>
-            <version>0.9.4</version>
+            <version>0.9.5-SNAPSHOT</version>
         </dependency>
     </dependencies>
 </project>
diff --git a/backend/hypervisor/pom.xml b/backend/hypervisor/pom.xml
index dc2a6312c..d13f05a71 100644
--- a/backend/hypervisor/pom.xml
+++ b/backend/hypervisor/pom.xml
@@ -5,18 +5,18 @@
     <parent>
         <groupId>com.github.zhkl0228</groupId>
         <artifactId>unidbg-parent</artifactId>
-        <version>0.9.4</version>
+        <version>0.9.5-SNAPSHOT</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
     <modelVersion>4.0.0</modelVersion>
 
     <artifactId>unidbg-hypervisor</artifactId>
-    <version>0.9.4</version>
+    <version>0.9.5-SNAPSHOT</version>
     <dependencies>
         <dependency>
             <groupId>com.github.zhkl0228</groupId>
             <artifactId>unidbg-api</artifactId>
-            <version>0.9.4</version>
+            <version>0.9.5-SNAPSHOT</version>
         </dependency>
     </dependencies>
 </project>
diff --git a/backend/kvm/pom.xml b/backend/kvm/pom.xml
index bc563e5d8..7b4d7f6be 100644
--- a/backend/kvm/pom.xml
+++ b/backend/kvm/pom.xml
@@ -5,18 +5,18 @@
     <parent>
         <groupId>com.github.zhkl0228</groupId>
         <artifactId>unidbg-parent</artifactId>
-        <version>0.9.4</version>
+        <version>0.9.5-SNAPSHOT</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
     <modelVersion>4.0.0</modelVersion>
 
     <artifactId>unidbg-kvm</artifactId>
-    <version>0.9.4</version>
+    <version>0.9.5-SNAPSHOT</version>
     <dependencies>
         <dependency>
             <groupId>com.github.zhkl0228</groupId>
             <artifactId>unidbg-api</artifactId>
-            <version>0.9.4</version>
+            <version>0.9.5-SNAPSHOT</version>
         </dependency>
     </dependencies>
 </project>
diff --git a/pom.xml b/pom.xml
index f7fecf225..6b756c3e1 100644
--- a/pom.xml
+++ b/pom.xml
@@ -4,7 +4,7 @@
     <groupId>com.github.zhkl0228</groupId>
     <artifactId>unidbg-parent</artifactId>
     <packaging>pom</packaging>
-    <version>0.9.4</version>
+    <version>0.9.5-SNAPSHOT</version>
     <modules>
         <module>unidbg-api</module>
         <module>unidbg-android</module>
diff --git a/unidbg-android/pom.xml b/unidbg-android/pom.xml
index 3d07f9b24..5440f2db6 100644
--- a/unidbg-android/pom.xml
+++ b/unidbg-android/pom.xml
@@ -5,34 +5,34 @@
     <parent>
         <groupId>com.github.zhkl0228</groupId>
         <artifactId>unidbg-parent</artifactId>
-        <version>0.9.4</version>
+        <version>0.9.5-SNAPSHOT</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
 
     <artifactId>unidbg-android</artifactId>
-    <version>0.9.4</version>
+    <version>0.9.5-SNAPSHOT</version>
     <dependencies>
         <dependency>
             <groupId>com.github.zhkl0228</groupId>
             <artifactId>unidbg-api</artifactId>
-            <version>0.9.4</version>
+            <version>0.9.5-SNAPSHOT</version>
         </dependency>
         <dependency>
             <groupId>com.github.zhkl0228</groupId>
             <artifactId>unidbg-dynarmic</artifactId>
-            <version>0.9.4</version>
+            <version>0.9.5-SNAPSHOT</version>
             <scope>test</scope>
         </dependency>
         <dependency>
             <groupId>com.github.zhkl0228</groupId>
             <artifactId>unidbg-hypervisor</artifactId>
-            <version>0.9.4</version>
+            <version>0.9.5-SNAPSHOT</version>
             <scope>test</scope>
         </dependency>
         <dependency>
             <groupId>com.github.zhkl0228</groupId>
             <artifactId>unidbg-kvm</artifactId>
-            <version>0.9.4</version>
+            <version>0.9.5-SNAPSHOT</version>
             <scope>test</scope>
         </dependency>
         <dependency>
diff --git a/unidbg-android/src/main/java/com/github/unidbg/linux/android/dvm/DalvikVM.java b/unidbg-android/src/main/java/com/github/unidbg/linux/android/dvm/DalvikVM.java
index c85754600..02904ab6a 100644
--- a/unidbg-android/src/main/java/com/github/unidbg/linux/android/dvm/DalvikVM.java
+++ b/unidbg-android/src/main/java/com/github/unidbg/linux/android/dvm/DalvikVM.java
@@ -109,14 +109,13 @@ public long handle(Emulator<?> emulator) {
         Pointer _GetSuperclass = svcMemory.registerSvc(new ArmSvc() {
             @Override
             public long handle(Emulator<?> emulator) {
-                Arm32RegisterContext context = emulator.getContext();
+                RegisterContext context = emulator.getContext();
                 UnidbgPointer clazz = context.getPointerArg(1);
                 DvmClass dvmClass = classMap.get(clazz.toIntPeer());
                 if (verbose) {
-                    System.out.printf("JNIEnv->GetSuperClass(%s) was called from %s%n", dvmClass,
-                            UnidbgPointer.register(emulator, ArmConst.UC_ARM_REG_LR));
+                    System.out.printf("JNIEnv->GetSuperClass(%s) was called from %s%n", dvmClass, context.getLRPointer());
                 }
-                if(dvmClass.getClassName().equals("java/lang/Object")){
+                if (dvmClass.getClassName().equals("java/lang/Object")) {
                     log.debug("JNIEnv->GetSuperClass was called, class = " + dvmClass.getClassName() + " According to Java Native Interface Specification, " +
                             "If clazz specifies the class Object, returns NULL.");
                     throw new BackendException();
diff --git a/unidbg-android/src/main/java/com/github/unidbg/linux/file/Stdout.java b/unidbg-android/src/main/java/com/github/unidbg/linux/file/Stdout.java
index 7a7b2f3e2..2455d00af 100644
--- a/unidbg-android/src/main/java/com/github/unidbg/linux/file/Stdout.java
+++ b/unidbg-android/src/main/java/com/github/unidbg/linux/file/Stdout.java
@@ -51,8 +51,10 @@ public int write(byte[] data) {
             if (debugStream != null) {
                 debugStream.write(data);
             }
-            out.write(data);
-            out.flush();
+            if (log.isWarnEnabled()) {
+                out.write(data);
+                out.flush();
+            }
             if (callback != null) {
                 callback.notifyOut(data, err);
             }
diff --git a/unidbg-android/src/test/java/com/github/unidbg/android/AndroidTest.java b/unidbg-android/src/test/java/com/github/unidbg/android/AndroidTest.java
index 6c7f5e680..67a3fa371 100644
--- a/unidbg-android/src/test/java/com/github/unidbg/android/AndroidTest.java
+++ b/unidbg-android/src/test/java/com/github/unidbg/android/AndroidTest.java
@@ -16,11 +16,14 @@
 import com.github.unidbg.linux.android.dvm.DvmClass;
 import com.github.unidbg.linux.android.dvm.VM;
 import com.github.unidbg.linux.android.dvm.VarArg;
+import com.github.unidbg.linux.file.Stdout;
 import com.github.unidbg.linux.struct.Dirent;
 import com.github.unidbg.memory.Memory;
 import com.github.unidbg.memory.SvcMemory;
 import com.github.unidbg.unix.UnixSyscallHandler;
 import com.sun.jna.Pointer;
+import org.apache.log4j.Level;
+import org.apache.log4j.Logger;
 
 import java.io.File;
 import java.io.IOException;
@@ -103,7 +106,7 @@ private void test() {
                 0x789a, 0.12345D, true, 0x123, 0.456f, 0.789123D, (byte) 0x7f,
                 0x89abcdefL, 0.123f);
 
-//        Logger.getLogger("com.github.unidbg.linux.ARM32SyscallHandler").setLevel(Level.DEBUG);
+        Logger.getLogger(Stdout.class).setLevel(Level.ERROR);
         System.err.println("exit code: " + module.callEntry(emulator) + ", backend=" + emulator.getBackend());
     }
 
diff --git a/unidbg-api/pom.xml b/unidbg-api/pom.xml
index 0bc255dfa..b0ce4cbe5 100644
--- a/unidbg-api/pom.xml
+++ b/unidbg-api/pom.xml
@@ -5,12 +5,12 @@
     <parent>
         <groupId>com.github.zhkl0228</groupId>
         <artifactId>unidbg-parent</artifactId>
-        <version>0.9.4</version>
+        <version>0.9.5-SNAPSHOT</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
 
     <artifactId>unidbg-api</artifactId>
-    <version>0.9.4</version>
+    <version>0.9.5-SNAPSHOT</version>
     <dependencies>
         <dependency>
             <groupId>com.github.zhkl0228</groupId>
diff --git a/unidbg-ios/pom.xml b/unidbg-ios/pom.xml
index e5d239702..cb273f1ef 100644
--- a/unidbg-ios/pom.xml
+++ b/unidbg-ios/pom.xml
@@ -5,34 +5,34 @@
     <parent>
         <groupId>com.github.zhkl0228</groupId>
         <artifactId>unidbg-parent</artifactId>
-        <version>0.9.4</version>
+        <version>0.9.5-SNAPSHOT</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
 
     <artifactId>unidbg-ios</artifactId>
-    <version>0.9.4</version>
+    <version>0.9.5-SNAPSHOT</version>
     <dependencies>
         <dependency>
             <groupId>com.github.zhkl0228</groupId>
             <artifactId>unidbg-api</artifactId>
-            <version>0.9.4</version>
+            <version>0.9.5-SNAPSHOT</version>
         </dependency>
         <dependency>
             <groupId>com.github.zhkl0228</groupId>
             <artifactId>unidbg-dynarmic</artifactId>
-            <version>0.9.4</version>
+            <version>0.9.5-SNAPSHOT</version>
             <scope>test</scope>
         </dependency>
         <dependency>
             <groupId>com.github.zhkl0228</groupId>
             <artifactId>unidbg-hypervisor</artifactId>
-            <version>0.9.4</version>
+            <version>0.9.5-SNAPSHOT</version>
             <scope>test</scope>
         </dependency>
         <dependency>
             <groupId>com.github.zhkl0228</groupId>
             <artifactId>unidbg-kvm</artifactId>
-            <version>0.9.4</version>
+            <version>0.9.5-SNAPSHOT</version>
             <scope>test</scope>
         </dependency>
         <dependency>
diff --git a/unidbg-ios/src/main/java/com/github/unidbg/ios/file/Stdout.java b/unidbg-ios/src/main/java/com/github/unidbg/ios/file/Stdout.java
index 4d4edb2c8..6c9163762 100644
--- a/unidbg-ios/src/main/java/com/github/unidbg/ios/file/Stdout.java
+++ b/unidbg-ios/src/main/java/com/github/unidbg/ios/file/Stdout.java
@@ -51,8 +51,10 @@ public int write(byte[] data) {
             if (debugStream != null) {
                 debugStream.write(data);
             }
-            out.write(data);
-            out.flush();
+            if (log.isWarnEnabled()) {
+                out.write(data);
+                out.flush();
+            }
             if (callback != null) {
                 callback.notifyOut(data, err);
             }