coins -> Bitcoin

Author: wenewzhang

README-zhchs.md

@@ -1,11 +1,11 @@
 # 第一课 一步一步教你用nodejs创建一个Mixin Network机器人
 [Mixin Network](https://mixin.one) 是一个免费的 极速的端对端加密数字货币交易系统.
-在本章中，你可以按教程在Mixin Messenger中创建一个bot来接收用户消息, 学到如何给机器人转帐 或者 让机器人给你转账.
+在本章中，你可以按教程在Mixin Messenger中创建一个bot来接收用户消息, 学到如何给机器人转**比特币** 或者 让机器人给你转**比特币**.
 
 
 ## 课程简介
 1. [创建一个接受消息的机器人](https://github.com/wenewzhang/mixin_network-nodejs-bot2/blob/master/README-zhchs.md#创建你的第一个机器人)
-2. [机器人:接受加密货币并立即退还用户](https://github.com/wenewzhang/mixin_network-nodejs-bot2/blob/master/README2-zhchs.md)
+2. [机器人接受比特币并立即退还用户](https://github.com/wenewzhang/mixin_network-nodejs-bot2/blob/master/README2-zhchs.md)
 
 ## 创建一个接受消息的机器人
 通过本教程，你将学会如何用nodejs创建一个机器人APP,让它能接受消息.

README.md

@@ -1,9 +1,9 @@
 # Mixin Messenger application development tutorial in Node.js
-This tutorial will let you know how to write a Mixin Messenger bot in Node.js. The bot can receive and response to user's message. User can pay token to bot and bot can transfer token to user.
+This tutorial will let you know how to write a Mixin Messenger bot in Node.js. The bot can receive and response to user's message. User can pay Bitcoin to bot and bot can transfer Bitcoin to user.
 
 ## Index
 1. [Create bot and receive message from user](https://github.com/wenewzhang/mixin_network-nodejs-bot2#create-bot-and-receive-message-from-user)
-2. [Receive token and pay token](https://github.com/wenewzhang/mixin_network-nodejs-bot2/blob/master/README2.md)
+2. [Receive and send Bitcoin](https://github.com/wenewzhang/mixin_network-nodejs-bot2/blob/master/README2.md)
 
 ## Create bot and receive message from user
 You will create a bot in Mixin Messenger to receive user message after read the chapter.

README2-zhchs.md

@@ -1,6 +1,6 @@
 在 [上一篇教程中](https://github.com/wenewzhang/mixin_network-nodejs-bot2/blob/master/README-zhchs.md), 我们创建了自动回复消息的机器人。
 
-# 第二课: 机器人接收与处理加密货币
+# 第二课: 机器人接受比特币并立即退还用户
 按本篇教程后学习后完成后，你的机器人将会接受用户发送过来的加密货币，然后立即转回用户。
 
 在开始之前， 开发者需要准备一些config.js的必备参数。

README2.md

@@ -1,7 +1,7 @@
 In [last chapter](https://github.com/wenewzhang/mixin_network-nodejs-bot2/blob/master/README.md), we create our first app.
 
-# Receive and send token
-Your bot can receive token from user and then pay it back immediately after read the chapter.
+# Receive and send Bitcoin
+Your bot can receive Bitcoin from user and then pay it back immediately after read the chapter.
 
 ### Fill AES key
 Now you need to fill some missing parameters in the config.js file.