No display when connecting to Apple AV adapter

Q: I use Apple Digital AV Adapter to connect my Macbook and Gechic monitor but the monitor doesn’t work and just turn on and off repeatedly.

📌：① 1.Use GeChic USB cable to power Gechic monitor by connecting to 5V-2A charger or power bank.
② Connect Gechic monitor to Macbook with the Micro HDMI to HDMI-A video cable. (※The USB-A port on Apple Digital AV Adapter cannot supply enough power to Gechic monitor, monitor won’t turn on without sufficient power.)