There is no factory-preset admin password. You create the admin password yourself during the very first setup wizard.
If you are prompted for a password and cannot remember it (or if you bought the router second-hand and the previous owner did not reset it), there is no "backdoor" password. You must perform a factory reset.
None (You create it during the first setup) 🛠️ Step-by-Step: How to Log In and Set Up Your Router xiaomi mi wifi router 4c default password 2021
By default, Xiaomi setup often suggests using the same password for both your Wi-Fi network and the administrator panel. How to Access and Reset Default WiFi Password and Name for Xiaomi router
Keep the router and plugged into the electrical outlet. There is no factory-preset admin password
Follow these steps to access the settings panel of your Xiaomi Mi WiFi Router 4C: 1. Connect to the Router
Look for a network starting with "Xiaomi_" or "Somi". You must perform a factory reset
The wizard will ask if you want to use the same Wi-Fi password as your Admin Management Password . Check this box for convenience, or uncheck it to type a completely different password for your router's settings backend. 🔄 Locked Out? How to Reset Your Xiaomi Router 4C