From b95437d07b2f15e1d99b3fa1f723fdb101b60496 Mon Sep 17 00:00:00 2001
From: David_Han <619409713@qq.com>
Date: Mon, 26 Oct 2020 14:51:22 +0800
Subject: [PATCH] update README.en.md.

---
 README.en.md | 21 +++++++++++++++------
 1 file changed, 15 insertions(+), 6 deletions(-)

diff --git a/README.en.md b/README.en.md
index b544ad1..9ae181d 100644
--- a/README.en.md
+++ b/README.en.md
@@ -3,20 +3,29 @@
 #### Description
 Nodelet Core Metapackage
 
+New in Electric: the nodelet packages are now part of nodelet_core. In previous releases, they were part of common.
+
+For documentation on using nodelets, please see the nodelet package. For nodelet libraries similar in function to the topic_tools package, see nodelet_topic_tools.
+
 #### Software Architecture
 Software architecture description
 
+nodelet_core
+
+
 #### Installation
 
-1.  xxxx
-2.  xxxx
-3.  xxxx
+1. Dowload RPM
+
+wget http://121.36.3.168:82/home:/davidhan:/branches:/openEuler:/Mainline/standard_aarch64/aarch64/nodelet_core-1.9.16-0.oe1.aarch64.rpm    
+
+2. Install RPM
+
+sudo rpm -ivh nodelet_core-1.9.16-0.oe1.aarch64.rpm    
 
 #### Instructions
 
-1.  xxxx
-2.  xxxx
-3.  xxxx
+Exit the nodelet_core file under the /opt/ros/melodic/devel_isolated/ directory , Prove that the software installation is successful
 
 #### Contribution