From b29bcaed238b1b9f816f279a08ecbd4b5ce6e479 Mon Sep 17 00:00:00 2001
From: "zhiyong.luo" <33410675+lazy-luo@users.noreply.github.com>
Date: Tue, 6 Nov 2018 14:49:48 +0800
Subject: [PATCH] Update README.md

---
 README.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/README.md b/README.md
index df38dc1..104dc54 100644
--- a/README.md
+++ b/README.md
@@ -4,7 +4,7 @@ Free, after testing will be open source. <br>
 It contains a Android client app and server program.<br>
 Usage:<br>
 ## 1、download android client app<br>
-## 2、register user<br>
+## 2、register user（the invitation code must be numeric and can be filled with any value）<br>
 ![login](https://github.com/lazy-luo/smarGate/blob/master/res/login.png)<br>
 ![register](https://github.com/lazy-luo/smarGate/blob/master/res/register.png)<br>
 ## 3、remember register key-number(N)<br>