How to connect? Yeelight celing light with remote control

How to connect the remote control with celing light??
Celing light is working with a switch on the wall. But not working with the remote control and yeelight app

You need to pair the remote controller with ceiling light firstly.
Power on the ceiling light (by wall switch), press M + OFF of the remote control within one minute. The LED on remote will blink at 1Hz. Wait the ceiling light to breathe which means the pairing is completed.