Yes, the Xiaomi Mesh System AX3000 NE can be connected to a Yallo Fibre Box. Here are some important points to note:

- The Xiaomi Mesh System AX3000 NE supports Gigabit Ethernet ports and WAN/LAN auto-sensing, which makes it possible to connect it directly to a Fibre Box.
- You need to connect the main device of the mesh system to the fibre box with the Ethernet cable to establish the Internet connection.
- After the physical connection, you can configure the network settings via the Mi Home/Xiaomi Home app or the router's web interface.