update doc

README.cn.md

@@ -298,9 +298,19 @@ sys     0m0.030s
 
 ## Import database
 
-导入 z.sh 的数据库很简单：
+导入 z.sh 的数据文件很简单，格式是一样的：
 
+
+```bash
 cat ~/.z >> ~/.zlua
+```
+
+导入 autojump 数据文件需要稍微转换下：
+
+```bash
+FN="$HOME/.local/share/autojump/autojump.txt"
+awk -F '\t' '{print $2 "|" $1 "|" 0}' $FN >> ~/.zlua
+```
 
 
 ## Credit

README.md

@@ -274,6 +274,23 @@ sys     0m0.030s
 As you see, z.lua is the fastest one and requires less resource.
 
 
+## Import database
+
+You can import your datafile from z.sh by：
+
+
+```bash
+cat ~/.z >> ~/.zlua
+```
+
+Import datafile from autojump by：
+
+```bash
+FN="$HOME/.local/share/autojump/autojump.txt"
+awk -F '\t' '{print $2 "|" $1 "|" 0}' $FN >> ~/.zlua
+```
+
+
 ## Credit
 
 Releated projects: