You can get translated and more detailed text here

Plug-in System

The newly introduced plug-in system makes Motion Emulator more powerful than ever.

• The main app itself is decoupled from Xposed.
• To implement full functionality, install Xposed-based plug-ins.
• You can get a list of available plug-ins in the Plug-in UI.
• Download, install and manage within clicks and gestures.

The power of plug-ins appears to be

• Flexibility: plug-ins can be optimized for certain apps, providing the best experience;
• Compatibility: host to module communication layer is separated from Motion Emulator, as a result of which special apps can be forged into the system;
• Management: specify different hooking methods per app;
• Advancement: different modules can be upgraded in parallel, fixing bugs and making improvement with ease.

WebSocket-based Protocol

• Implementation of realtime communication between host app and module.
• ProtoBuf is used for improved efficiency.

Better Emulation

• Severe bugs of v1.1.7, the last release, have been fixed.
• Because of the above changes, the Websocket Plugin carries the latest improvements.