“Over the wall” refers to accessing blocked websites or services by bypassing geographical restrictions and censorship on the Internet through some technical means. Often these means include the use of virtual private networks (VPNs), proxy servers, Shadowsocks, etc.

“Scientific Internet” is a similar term, which also refers to the use of some technical means to access blocked websites or services, but places more emphasis on the meaning of bypassing Internet censorship, enabling users to freely obtain information and communicate on the Internet . Scientific Internet access is also often used to protect users’ online privacy and data security, especially when using public wireless networks or Internet access in areas with strict network monitoring.