diff --git a/.DS_Store b/.DS_Store
index 9e71a2c..fec422b 100644
Binary files a/.DS_Store and b/.DS_Store differ
diff --git a/.gitignore b/.gitignore
index e507027..db2b103 100644
--- a/.gitignore
+++ b/.gitignore
@@ -15,4 +15,5 @@ original-book/*
 
 .DS_Store
 *.mtc*
-*.maf
\ No newline at end of file
+*.maf
+.DS_Store
diff --git a/README.md b/README.md
index 25ae861..fab69ad 100644
--- a/README.md
+++ b/README.md
@@ -16,7 +16,13 @@
 
 ## 打印指南
 
-本书未采用原书开本TODO
+本书未采用原书开本。推荐将PDF裁剪后使用187 mm × 235 mm尺寸打印。
+
+推荐四边裁剪参数如下：
+
+- 上：4 mm
+- 下：29 mm
+- 左、右：各10 mm
 
 ## 更新日志
 
diff --git a/img/cover-original.pdf b/img/cover-original.pdf
new file mode 100644
index 0000000..17a88ae
Binary files /dev/null and b/img/cover-original.pdf differ
diff --git a/img/cover-original.pxd b/img/cover-original.pxd
index 1904ae6..26b8d59 100644
Binary files a/img/cover-original.pxd and b/img/cover-original.pxd differ
diff --git a/img/transparentcover.pdf b/img/transparentcover.pdf
index 8f2d6ba..819a8ab 100644
Binary files a/img/transparentcover.pdf and b/img/transparentcover.pdf differ
diff --git "a/main-\346\211\223\345\215\260\350\243\201\345\211\252.pdf" "b/main-\346\211\223\345\215\260\350\243\201\345\211\252.pdf"
new file mode 100644
index 0000000..962a36c
Binary files /dev/null and "b/main-\346\211\223\345\215\260\350\243\201\345\211\252.pdf" differ
diff --git a/main.pdf b/main.pdf
index 4969585..3995290 100644
Binary files a/main.pdf and b/main.pdf differ
diff --git a/main.tex b/main.tex
index cd1169c..408aab6 100644
--- a/main.tex
+++ b/main.tex
@@ -547,7 +547,7 @@
     ~\\
     \vspace{\stretch{1}}
     \includegraphics[width=0.75\linewidth]{img/transparentcover}
-    \vspace{\stretch{1}}
+    \vspace{\stretch{2}}
     ~\\
 \end{center}
 % \vspace{\stretch{1}}