diff --git a/history/005b_letter_test/run.bat b/history/005b_letter_test/run.bat
new file mode 100644
index 0000000..0156beb
--- /dev/null
+++ b/history/005b_letter_test/run.bat
@@ -0,0 +1,3 @@
+call mvn clean compile
+cd target\classes
+java -classpath ".;*" com.gitee.drinkjava2.frog.Application
\ No newline at end of file