diff --git a/.appveyor.yml b/.appveyor.yml
index cfdd9b2441..ce68c5adb1 100644
--- a/.appveyor.yml
+++ b/.appveyor.yml
@@ -6,6 +6,11 @@ version: 2.1.0.{build}
 install:
   - git submodule update --init --recursive
 
+skip_commits:
+  files:
+    - docs/*
+    - '**/*.md'
+
 build_script:
   - pwsh: .\build.ps1 -p wasm -xb '--target','cpp-tests','--config','Release' -xc '-DAX_ENABLE_EXT_EFFEKSEER=ON','-DAX_WASM_THREADS=8'
   - pwsh: .\build.ps1 -p wasm -xb '--target','fairygui-tests','--config','Release' -xc '-DAX_ENABLE_EXT_EFFEKSEER=ON','-DAX_WASM_THREADS=8'
diff --git a/core/2d/FontAtlas.cpp b/core/2d/FontAtlas.cpp
index 202e6a92c3..107b1c5056 100644
--- a/core/2d/FontAtlas.cpp
+++ b/core/2d/FontAtlas.cpp
@@ -64,7 +64,7 @@ void FontAtlas::loadFontAtlas(std::string_view fontatlasFile, hlookup::string_ma
         std::string_view type       = settings["type"];
         if (type != "fontatlas")
         {
-            ax::print("Load fontatlas %s fail, invalid asset type: ", fontatlasFile.data(), type.data());
+            ax::print("Load fontatlas %s fail, invalid asset type: %s", fontatlasFile.data(), type.data());
             return;
         }
 
diff --git a/core/2d/FontFreeType.h b/core/2d/FontFreeType.h
index d0124ff9f7..4ac63f34c9 100644
--- a/core/2d/FontFreeType.h
+++ b/core/2d/FontFreeType.h
@@ -70,7 +70,7 @@ public:
     static void setMissingGlyphCharacter(char32_t charCode) { _mssingGlyphCharacter = charCode; };
 
     /**
-     * @brief Whether enable SDF font rendering globally, by default: disabled, since axmol-2.0.1
+     * @brief Whether enable SDF font rendering globally, by default: disabled, since axmol-2.1.0
      *
      * @param enabled
      */
diff --git a/core/2d/Label.h b/core/2d/Label.h
index 2453464518..d3aeeaf2a1 100644
--- a/core/2d/Label.h
+++ b/core/2d/Label.h
@@ -550,11 +550,11 @@ public:
 
     /**
      * Set the ttf/ttc font face size to determine how big to generate SDF bitmap
-     * since axmol-2.0.1
+     * since axmol-2.1.0
      */
     void setTTFFaceSize(int faceSize);
 
-    /** Gets ttf/ttc font face size, since axmol-2.0.1 */
+    /** Gets ttf/ttc font face size, since axmol-2.1.0 */
     int getTTFFaceSize() const;
 
     /**
diff --git a/core/platform/Device.h b/core/platform/Device.h
index 3205336332..334e971404 100644
--- a/core/platform/Device.h
+++ b/core/platform/Device.h
@@ -86,6 +86,7 @@ public:
     
     /**
      * Gets the device pixel ratio
+     * @since axmol-2.1.0
      */
     static float getPixelRatio();
 
diff --git a/core/platform/android/java/src/org/axmol/lib/AxmolEngine.java b/core/platform/android/java/src/org/axmol/lib/AxmolEngine.java
index f9125776a8..79389f5d58 100644
--- a/core/platform/android/java/src/org/axmol/lib/AxmolEngine.java
+++ b/core/platform/android/java/src/org/axmol/lib/AxmolEngine.java
@@ -404,12 +404,7 @@ public class AxmolEngine {
 
     private static int displayMetricsToDPI(DisplayMetrics metrics)
     {
-        if(metrics.xdpi != metrics.ydpi) {
-            Log.w(AxmolEngine.TAG, "xdpi != ydpi, use (xdpi + ydpi)/2 instead.");
-            return (int) ((metrics.xdpi + metrics.ydpi) / 2.0);
-        } else {
-            return (int)metrics.xdpi;
-        }
+        return metrics.densityDpi;
     }
 
     public static int getDPI()
diff --git a/core/platform/win32/Device-win32.cpp b/core/platform/win32/Device-win32.cpp
index 18a91d3063..c10e405d5b 100644
--- a/core/platform/win32/Device-win32.cpp
+++ b/core/platform/win32/Device-win32.cpp
@@ -46,9 +46,12 @@ int Device::getDPI()
     return dpi;
 }
 
-float Device::getPixelRatio() 
+float Device::getPixelRatio()
 {
-    return Device::getDPI() / 96.0f;
+    const HDC dc    = GetDC(NULL);
+    const auto xdpi = GetDeviceCaps(dc, LOGPIXELSX);
+    ReleaseDC(nullptr, dc);
+    return xdpi / 96.0f;
 }
 
 void Device::setAccelerometerEnabled(bool isEnabled) {}
diff --git a/core/platform/winrt/xaml/AxmolRenderer.cpp b/core/platform/winrt/xaml/AxmolRenderer.cpp
index d6710b52e8..6fba34e640 100644
--- a/core/platform/winrt/xaml/AxmolRenderer.cpp
+++ b/core/platform/winrt/xaml/AxmolRenderer.cpp
@@ -59,7 +59,7 @@ void AxmolRenderer::Resume()
     if (!glview)
     {
         GLViewImpl* glview = GLViewImpl::createWithRect(
-            "AXMOL10", ax::Rect{0, 0, static_cast<float>(m_width), static_cast<float>(m_height)});
+            "axmol2", ax::Rect{0, 0, static_cast<float>(m_width), static_cast<float>(m_height)});
         glview->UpdateOrientation(m_orientation);
         glview->SetDPI(m_dpi);
         glview->setDispatcher(m_dispatcher);