How to enable the child lock function on the Mijia Air Conditioner Eco EGAT Label No.5 with 1 Star 9000BTU?

The Mijia Air Conditioner Eco EGAT Label No.5 with 1 Star 9000BTU supports the child lock function, which helps prevent accidental operation or unintended setting changes by children. Locking the remote control enhances safety and ensures stable and worry-free operation.
You can simultaneously press and hold both the [+] and [-] buttons on the remote control for more than 3 seconds to enable or disable the child lock function of the remote control. When the child lock function is enabled, the device will continue to operate according to the settings in effect before the lock is activated.