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Explain proxy + VPN concept to me please
Hi so tldr I am trying to wrap my head around the concept of trying to obfuscate VPN traffic.
Correct me if I am wrong but this is what I have learnt so far after googling:
So if one uses a VPN, it creates a tunnel and everything inside the tunnel is secured from the client to the server. However, isp will know you are using a VPN.
So here comes obfuscation where I will obfuscate the VPN traffic with v2ray.
So my phone is my client. In my phone, I will install wireguard + v2ray client. When I click on a webpage, traffic will be sent from my wireguard client to my v2ray client which will obfuscate the traffic. The traffic will leave my phone and flow through the ISP to my server.
On the server side, the v2ray server will take the traffic and redirect to wireguard server and wireguard will do it's thing.
Am I right so far?
So to my knowledge this is sufficient to bypass the great firewall/any firewall?
Is there any other methods/layering/protocols to use to make it even more robust ?
If anyone have any resources, feel free to point me to the right direction! Any help is appreciated 
Am heading to china in a couple of weeks so it will be cool if my own vpn can be used. Just realised that wireguard won't work well in china as it can be detected.
Comments
If we see twenty pizzas showing up at your door, you must be hosting a party.
If we see large amounts of traffic in one connection, you must be either using a VPN or streaming a video.
If we see your client IP has only one connection, you must be using a VPN.
This is called traffic analysis and does not depend on identifying or decrypting traffic.
The countermeasure to such analysis would be sending the obfuscated VPN traffic to multiple server IPs.
You can design a client that sends each obfuscated WireGuard packet to one of fifty IPs all over the world, and let all these servers forward all the packets to the WireGuard server.
It would be much harder to identify you are actually running VPN.
Go via Hong Kong, buy a SIM from 3 mobile. Problem solved. (other providers are available)
Alternatively: find a SIM provider in your home country that allows free roaming in China. China Mobile sells SIMs in quite a few countries. Again, problem solved.
No, no, no, not as you understand it.
You should use an Internet protocol such as trojan, or VLess, or hysteria.
Alternatively, you should use protonVPN, who is very reliable and can be used in China.
As far as I can tell as a foreigner (or at least a foreigner as far as they're concerned - the Chinese bureaucracy literally cannot keep accurate and consistent records on their citizens on a consistent basis for the Han supermajority) the state security apparatus don't really care all that much unless there is a reason to do so. The threat model is inherently different for those who cannot claim status besides Chinese - regardless of ethnicity - because you are basically stuck in their walled garden with the aid of American sinophobia dating back to the 1870s under the color of law. My mom is in China for 6 months every year (my grandmother has dementia and without straight up pulling rank three's no guarantee of care at all) and Google Fi, in spite of Google's absence in China, works without issue. Like many (if not most) who naturalized, she's American until getting past passport control, since she has a current Chinese ID and hukou and all the accoutrements, and if you think you can teach someone whose primary computing device is an iPad Pro M4 and still sends me messages at random hours for tech support how to use ClashX or Vless, feel free to give it a shot but the fact that she can leave and has a generic enough name and lives in a large city is plenty of protection.
Her problem is that on the American side there's frequently a blanket block of traffic from China when it comes to banking, DMV, insurance, etc. In fact she can't even pay her property taxes online. I don't know what idiot believes that someone in China on an unjailbroken iPad or iPhone (JA3 fingerprinting is a thing, after all, not that my mom even knows what user-agents do) would go out of their way to use the payment of property taxes and renewal of her vehicle registration as an attack vector is... bewildering. This is true even after she informs of her bank of her travels because there's no way to tell state agencies that, and also, for some reason your card might get locked even with after you tell your bank your plans. CC fraud exists, but nobody is paying their car registration renewals with a stolen credit card when the car is in their name. Instead, my bank account is the human-powered proxy for anything of importance, everything else an eSim from Fi works just fine.
Like I said, any foreign SIM that includes roaming in China will be probably be fine - AFAIK they all get routed to your home country first. HK is a really good choice as it's close to China and so it's still pretty fast if you want to access anything in China itself, e.g. Alipay or Wechat pay.
It's much less hassle than trying to use a firewall, plus it's completely legal instead of just "mostly turn a blind eye for foreigners".