Look the HW specs is a good router in good price. (75USD in China)
It has enough performance to run some application on it, and the HW quality is definitely great. (compare to other router)
CPU1: MediaTek MT7621A (880 MHz, 2c4t)
FLA1: 256 MiB
RAM1: 512 MiB
USB ports: 1 (3.0)
WI1 chip1: MediaTek MT7615N (4x4:4)
WI2 chip1: MediaTek MT7615N (4x4:4)
LAN: 3xGbE
WAN: 1xGbE
Bootloader: U-Boot
Source: https://wikidevi.com/wiki/Xiaomi_MiWiFi_Pro
Thanks.