Link to Xiaomi Mi device (use Wifi not Zigbee)

Im new to Hass before i use google home to control everything. Now i switch to Hass but i don’t know how to link Hass with Xiaomi Mi devices (Bedside Lamp Mijia Xiaomi, Xiaomi Mi Smart LED,etc). These devices i bought from my official mi store in my country (Viet Nam - Southeast Asia) and all of them use wifi not zigbee.