diff --git a/game-programmer-zh-cn.dot b/game-programmer-zh-cn.dot
index 105d6cc..44750a8 100644
--- a/game-programmer-zh-cn.dot
+++ b/game-programmer-zh-cn.dot
@@ -90,17 +90,17 @@ digraph {
             kidintermediate [label="中级孩童游戏编程"]
         }
 
-        scratchjr [label=<<TABLE BORDER="0" CELLSPACING="0"><TR><TD WIDTH="100" HEIGHT="100" FIXEDSIZE="TRUE"><IMG SCALE="TRUE" SRC="images/scratchjr.jpg"/></TD></TR><TR><TD>动手玩转ScratchJr编程 (2016)</TD></TR></TABLE>> URL="https://book.douban.com/subject/26906848/"]
+        scratchjr [label=<<TABLE BORDER="0" CELLSPACING="0"><TR><TD WIDTH="100" HEIGHT="100" FIXEDSIZE="TRUE"><IMG SCALE="TRUE" SRC="images-zh-cn/scratchjr.jpg"/></TD></TR><TR><TD>动手玩转ScratchJr编程 (2016)</TD></TR></TABLE>> URL="https://book.douban.com/subject/26906848/"]
         
         codinggamesinscratch [label=<<TABLE BORDER="0" CELLSPACING="0"><TR><TD WIDTH="100" HEIGHT="100" FIXEDSIZE="TRUE"><IMG SCALE="TRUE" SRC="images/codinggamesinscratch.jpg"/></TD></TR><TR><TD>Coding Games<br/>in Scratch<br/>(2015)</TD></TR></TABLE>> URL="https://www.amazon.com/dp/1465439358/"]
-        superscratchprogadv [label=<<TABLE BORDER="0" CELLSPACING="0"><TR><TD WIDTH="100" HEIGHT="100" FIXEDSIZE="TRUE"><IMG SCALE="TRUE" SRC="images/superscratchprogadv.jpg"/></TD></TR><TR><TD>Scratch超人漫游记 (2017)</TD></TR></TABLE>> URL="https://book.douban.com/subject/27072003/"]
-        learntoprogramwithscratch [label=<<TABLE BORDER="0" CELLSPACING="0"><TR><TD WIDTH="100" HEIGHT="100" FIXEDSIZE="TRUE"><IMG SCALE="TRUE" SRC="images/learntoprogramwithscratch.jpg"/></TD></TR><TR><TD>动手玩转Scratch2.0编程 (2015)</TD></TR></TABLE>> URL="https://book.douban.com/subject/26658602/"]
+        superscratchprogadv [label=<<TABLE BORDER="0" CELLSPACING="0"><TR><TD WIDTH="100" HEIGHT="100" FIXEDSIZE="TRUE"><IMG SCALE="TRUE" SRC="images-zh-cn/superscratchprogadv.jpg"/></TD></TR><TR><TD>Scratch超人漫游记 (2017)</TD></TR></TABLE>> URL="https://book.douban.com/subject/27072003/"]
+        learntoprogramwithscratch [label=<<TABLE BORDER="0" CELLSPACING="0"><TR><TD WIDTH="100" HEIGHT="100" FIXEDSIZE="TRUE"><IMG SCALE="TRUE" SRC="images-zh-cn/learntoprogramwithscratch.jpg"/></TD></TR><TR><TD>动手玩转Scratch2.0编程 (2015)</TD></TR></TABLE>> URL="https://book.douban.com/subject/26658602/"]
         helpyoukidswithcomputercoding [label=<<TABLE BORDER="0" CELLSPACING="0"><TR><TD WIDTH="100" HEIGHT="100" FIXEDSIZE="TRUE"><IMG SCALE="TRUE" SRC="images/helpyoukidswithcomputercoding.jpg"/></TD></TR><TR><TD>Help Your Kids<br/>with Computer Coding<br/>(2015)</TD></TR></TABLE>> URL="https://www.amazon.com/dp/146541956X/"]
         
         inventgamepython3 [label=<<TABLE BORDER="0" CELLSPACING="0"><TR><TD WIDTH="100" HEIGHT="100" FIXEDSIZE="TRUE"><IMG SCALE="TRUE" SRC="images/inventgamepython3.jpg"/></TD></TR><TR><TD>Invent Your Own<br/>Computer Games with<br/>Python 3rd Ed (2015)</TD></TR></TABLE>> URL="https://www.amazon.com/dp/1503212300/"]
         makinggamespython [label=<<TABLE BORDER="0" CELLSPACING="0"><TR><TD WIDTH="100" HEIGHT="100" FIXEDSIZE="TRUE"><IMG SCALE="TRUE" SRC="images/makinggamespython.jpg"/></TD></TR><TR><TD>Making Games with<br/>Python &amp; Pygame (2012)</TD></TR></TABLE>> URL="https://www.amazon.com/dp/1469901730/"]
         learntoprogramwithminecraft [label=<<TABLE BORDER="0" CELLSPACING="0"><TR><TD WIDTH="100" HEIGHT="100" FIXEDSIZE="TRUE"><IMG SCALE="TRUE" SRC="images/learntoprogramwithminecraft.jpg"/></TD></TR><TR><TD>Learn to Program<br/>with Minecraft (2015)</TD></TR></TABLE>> URL="https://www.amazon.com/dp/1593276702/"]
-        adventuresinminecraft [label=<<TABLE BORDER="0" CELLSPACING="0"><TR><TD WIDTH="100" HEIGHT="100" FIXEDSIZE="TRUE"><IMG SCALE="TRUE" SRC="./images-zh-cn/adventuresinminecraft.jpg"/></TD></TR><TR><TD>零基础学Minecraft编程<br/>(2015)</TD></TR></TABLE>> URL="https://book.douban.com/subject/26613247/"]
+        adventuresinminecraft [label=<<TABLE BORDER="0" CELLSPACING="0"><TR><TD WIDTH="100" HEIGHT="100" FIXEDSIZE="TRUE"><IMG SCALE="TRUE" SRC="images-zh-cn/adventuresinminecraft.jpg"/></TD></TR><TR><TD>零基础学Minecraft编程<br/>(2015)</TD></TR></TABLE>> URL="https://book.douban.com/subject/26613247/"]
         "3dgpforkids" [label=<<TABLE BORDER="0" CELLSPACING="0"><TR><TD WIDTH="100" HEIGHT="100" FIXEDSIZE="TRUE"><IMG SCALE="TRUE" SRC="images/3dgpforkids.jpg"/></TD></TR><TR><TD>3D Game Programming<br/>for Kids (2013)</TD></TR></TABLE>> URL="https://www.amazon.com/dp/1937785440/"]
 
         age5 -> scratchjr -> age8
diff --git a/game-programmer-zh-cn.jpg b/game-programmer-zh-cn.jpg
index 89acb2a..30af5a7 100644
Binary files a/game-programmer-zh-cn.jpg and b/game-programmer-zh-cn.jpg differ
diff --git a/game-programmer-zh-cn.pdf b/game-programmer-zh-cn.pdf
index aa58e1c..e5685c9 100644
Binary files a/game-programmer-zh-cn.pdf and b/game-programmer-zh-cn.pdf differ
diff --git a/game-programmer-zh-cn.png b/game-programmer-zh-cn.png
index 5857a28..c1c158a 100644
Binary files a/game-programmer-zh-cn.png and b/game-programmer-zh-cn.png differ
diff --git a/game-programmer-zh-cn.svg b/game-programmer-zh-cn.svg
index 318958d..c6f6dc6 100644
--- a/game-programmer-zh-cn.svg
+++ b/game-programmer-zh-cn.svg
@@ -284,7 +284,7 @@
 <g id="node24" class="node">
 <title>scratchjr</title>
 <g id="a_node24"><a xlink:href="https://book.douban.com/subject/26906848/" xlink:title="&lt;TABLE&gt;">
-<image xlink:href="images/scratchjr.jpg" width="72.7214px" height="96px" preserveAspectRatio="xMinYMin meet" x="122.185" y="-13138"/>
+<image xlink:href="images-zh-cn/scratchjr.jpg" width="71.4894px" height="96px" preserveAspectRatio="xMinYMin meet" x="122.801" y="-13138"/>
 <text text-anchor="start" x="91.311" y="-13030" font-family="Helvetica-Light" font-size="10.00" fill="#000000">动手玩转ScratchJr编程 (2016)</text>
 </a>
 </g>
@@ -322,7 +322,7 @@
 <g id="node26" class="node">
 <title>superscratchprogadv</title>
 <g id="a_node26"><a xlink:href="https://book.douban.com/subject/27072003/" xlink:title="&lt;TABLE&gt;">
-<image xlink:href="images/superscratchprogadv.jpg" width="67.3347px" height="96px" preserveAspectRatio="xMinYMin meet" x="414.879" y="-13138"/>
+<image xlink:href="images-zh-cn/superscratchprogadv.jpg" width="71.4894px" height="96px" preserveAspectRatio="xMinYMin meet" x="412.801" y="-13138"/>
 <text text-anchor="start" x="390.476" y="-13030" font-family="Helvetica-Light" font-size="10.00" fill="#000000">Scratch超人漫游记 (2017)</text>
 </a>
 </g>
@@ -415,7 +415,7 @@
 <g id="node27" class="node">
 <title>learntoprogramwithscratch</title>
 <g id="a_node27"><a xlink:href="https://book.douban.com/subject/26658602/" xlink:title="&lt;TABLE&gt;">
-<image xlink:href="images/learntoprogramwithscratch.jpg" width="72.7214px" height="96px" preserveAspectRatio="xMinYMin meet" x="413.185" y="-12978"/>
+<image xlink:href="images-zh-cn/learntoprogramwithscratch.jpg" width="73.2086px" height="96px" preserveAspectRatio="xMinYMin meet" x="412.942" y="-12978"/>
 <text text-anchor="start" x="379.526" y="-12870" font-family="Helvetica-Light" font-size="10.00" fill="#000000">动手玩转Scratch2.0编程 (2015)</text>
 </a>
 </g>
@@ -458,7 +458,7 @@
 <g id="node32" class="node">
 <title>adventuresinminecraft</title>
 <g id="a_node32"><a xlink:href="https://book.douban.com/subject/26613247/" xlink:title="&lt;TABLE&gt;">
-<image xlink:href="./images-zh-cn/adventuresinminecraft.jpg" width="74.4348px" height="96px" preserveAspectRatio="xMinYMin meet" x="266.829" y="-12612"/>
+<image xlink:href="images-zh-cn/adventuresinminecraft.jpg" width="74.4348px" height="96px" preserveAspectRatio="xMinYMin meet" x="266.829" y="-12612"/>
 <text text-anchor="start" x="253.206" y="-12504" font-family="Helvetica-Light" font-size="10.00" fill="#000000">零基础学Minecraft编程</text>
 <text text-anchor="start" x="289.596" y="-12494" font-family="Helvetica-Light" font-size="10.00" fill="#000000">(2015)</text>
 </a>
@@ -1765,7 +1765,7 @@
 <g id="node130" class="node">
 <title>gpalgorithmstechniques</title>
 <g id="a_node130"><a xlink:href="https://book.douban.com/subject/26906838/" xlink:title="&lt;TABLE&gt;">
-<image xlink:href="./images-zh-cn/gpalgorithmstechniques.jpg" width="75.6072px" height="96px" preserveAspectRatio="xMinYMin meet" x="46.7424" y="-8100"/>
+<image xlink:href="./images-zh-cn/gpalgorithmstechniques.jpg" width="72px" height="96px" preserveAspectRatio="xMinYMin meet" x="48.546" y="-8100"/>
 <text text-anchor="start" x="39.546" y="-7992" font-family="Helvetica-Light" font-size="10.00" fill="#000000">游戏编程算法与技巧</text>
 <text text-anchor="start" x="70.096" y="-7982" font-family="Helvetica-Light" font-size="10.00" fill="#000000">(2016)</text>
 </a>
diff --git a/images-zh-cn/gpalgorithmstechniques.jpg b/images-zh-cn/gpalgorithmstechniques.jpg
index f616235..2af5d3b 100644
Binary files a/images-zh-cn/gpalgorithmstechniques.jpg and b/images-zh-cn/gpalgorithmstechniques.jpg differ
diff --git a/images-zh-cn/learntoprogramwithscratch.jpg b/images-zh-cn/learntoprogramwithscratch.jpg
index 3830215..4a1513d 100644
Binary files a/images-zh-cn/learntoprogramwithscratch.jpg and b/images-zh-cn/learntoprogramwithscratch.jpg differ
diff --git a/images-zh-cn/scratchjr.jpg b/images-zh-cn/scratchjr.jpg
index 2f194a5..5bbe5b5 100644
Binary files a/images-zh-cn/scratchjr.jpg and b/images-zh-cn/scratchjr.jpg differ
diff --git a/images-zh-cn/superscratchprogadv.jpg b/images-zh-cn/superscratchprogadv.jpg
index 20a7a44..ac2497a 100644
Binary files a/images-zh-cn/superscratchprogadv.jpg and b/images-zh-cn/superscratchprogadv.jpg differ