In China,we can not access Google webiste.But we need search some paper form Google,so I recommand shadowsocks to help you.

Shadowsocks is a secure socks5 proxy, designed to protect your Internet traffic.
Here I don't suggest to use centos 8,because centos not have python 2 development environment.Here I suggest to keep centos 7 environment.

First:Install pip

wget https://bootstrap.pypa.io/get-pip.py -o get-pip.py
python get-pip.py

If you not have wget download tool, you need do this before install pip:

yum install wget

Second:Install shadowsocks

pip install shadowsocks

Third:Write a shadowsocks config file

The file:

{
	"server":"::",
	"server_port":*****,
	"password":"123456",
	"method":"rc4-md5"
}

server: "::" represent you can use ipv4 address and ipv6 address meantime.
server_port: your shadowsocks' listen port.
method: encrypte method."rc4-md5" is a simple encrypte method.It needn't lots of cpu resources.

Forth:Run progress

ssserver -c shadowsocks.json -d start