免流是什么

免流就是免流量费的意思，实现免流量费的核心思路就是利用代理软件把手机的流量伪装成运营商不收费的流量进行上网。什么样的流量是运营商不收费的流量呢？一种是所谓的定向流量，比如我使用的电信星卡，对百度系、头条系、爱奇艺等应用的流量是免费的。另一种是绿色通道流量，绿色通道是指手机停机时也可以访问的网站，之所以让你能在停机的状态下访问这个网站，是为了让你方便为手机充值的，但不是所有的地区都有绿色通道的，并且现在对绿色通道的网速也有限制。

于是，相对应的免流方式有两种，一种是伪装定向流量免流，另一种是停机卡免流，本文介绍一种基于xray面板搭建免流节点的方式，供读者参考。

What Is Free Data

Free data means being exempt from data charges. The core idea behind it is to use a proxy tool to disguise your phone’s traffic as traffic that the carrier does not charge for. What kind of traffic does the carrier not charge for? One kind is the so-called directional traffic - for example, the China Telecom Star Card I use gives free data for apps in the Baidu family, Toutiao family, iQiyi, and so on. The other kind is green channel traffic: the green channel refers to websites that can still be accessed when your phone is suspended. The reason these sites are accessible while suspended is so that you can conveniently top up your phone, but not every region has a green channel, and the green channel’s bandwidth is also limited these days.

Correspondingly, there are two ways to get free data: one is disguising directional traffic, and the other is suspended-card free data. This article introduces a way to set up a free-data node based on the xray panel for your reference.

需求分析

emm… 怎么说呢，日常使用电脑你肯定不需要自动登录校园网，但是在某些特殊情况下，如果你的主机与互联网断开了连接，而你又无法在现场操作主机登录校园网，那通常意味着生产力的下降，科研进度的延误等等后果…

前两周由于疫情原因学校关闭了实验室，志成哥在寝室用笔记本登录了一下校园网，就挤掉了实验室的服务器网络，导致无法使用向日葵进行远程连接。只能选择挨门卫大爷一顿骂然后去实验室重新登录校园网。如果当时志成哥的服务器上运行了自动登录校园网的定时任务，就可以免于这一顿挨骂了😂。

试想一下，如果寒假在家期间想要使用实验室的主机进行工作，但是却因为学校的网络中心抽风进行升级维护，导致主机与互联网断开连接，那可就不是挨一顿骂就能解决的了。

寒假即将到来，为了避免上述尴尬局面的发生，故提前完成这一需求。

Requirements Analysis

Emm… how to put it? For everyday computer use, you certainly don’t need auto-login to the campus network. But in certain special situations, if your host loses its connection to the Internet and you can’t be physically present to log the host in to the campus network, it usually means a drop in productivity, delays in research progress, and other such consequences…

Two weeks ago, the school closed the lab because of the pandemic. Brother Zhicheng logged in to the campus network with his laptop in the dorm, which kicked the lab server off the network and made it impossible to remote-connect via Sunflower (向日葵). The only option was to take a scolding from the security guard and go to the lab to log the campus network back in. If Brother Zhicheng’s server had been running a scheduled auto-login task at the time, he would have been spared that scolding😂.

Imagine that during the winter break you want to use the lab’s host to work from home, but the school’s network center has a glitch during an upgrade or maintenance, cutting the host off from the Internet. That would not be solved by just getting scolded.

Winter break is coming. To avoid the embarrassing situation above, I’m completing this requirement in advance.

这是我研一刚来时和室友的对话，因为我本人很喜欢玩电脑，网络质量就是我的生活质量，所以研一刚来当天就咨询了这个问题。听完之后对比一下家里的收费标准，结论就是一个字：贵！

奈何当时的我还小，知识面太窄，只能任其剥削压迫。

现在可不一样了😏

This was the conversation I had with my roommate when I first arrived as a first-year graduate student. Since I really enjoy playing with computers, network quality is my quality of life, so I asked about this on my very first day. After hearing it and comparing it with the pricing at home, the conclusion was one word: expensive!

But I back then was still young and knew too little, so I could only let it exploit and oppress me.

Now it’s a different story😏

游戏目标

制作定时桥，当人物未在规定时间内过桥将会失败。

大体需要以下几个步骤：

1. 制作地形，建造一座桥 Bridge
2. 制作按键 ButtonBridge
3. 制作计时器 TimerDisplay

PS：这是少儿编程

Game Goal

Make a timed bridge: if the character fails to cross the bridge within the set time, the game fails.

Roughly the following steps are needed:

1. Create the terrain and build a bridge — Bridge
2. Make the button — BridgeButton
3. Make the timer — TimerDisplay

PS: this is kids’ programming