By office you mean home office (your personal office at home) or an actual office?

If this is for a real office setup, you seriously need to invest in better hardware. Don’t rely on these budget options to keep things running smoothly.

Xiaomi routers don’t even have built-in antivirus or malware protection—that’s a basic feature that any office network should have. At the very least, go for something like ASUS. They offer much better performance and security.