Yes, the eSIM for China does include a built-in VPN feature. Here's how it works:
When you activate the eSIM, it connects to a local Mobile Network Operator (MNO) such as China Unicom to ensure network connectivity within China. However, to bypass the Great Firewall of China and access websites and services like Facebook, Instagram, Gmail, Google services, WhatsApp, and more, the internet traffic is routed through a server located in a nearby country.
This routing allows users to enjoy internet access akin to their home country, without being restricted by China's internet censorship policies. In essence, the built-in VPN feature enables seamless and unrestricted access to a wide range of online services while in China.