How to train birds to "license fortune telling"?

You can choose the white-waisted wenbird for training.

Because it loves to eat millet and perilla, it can be soaked in sweet vinegar during training. After feeding for a period of time, birds will automatically look for sweet and sour food. In fortune telling, apply sweet and sour on one side of the brand, and then let the sweet and sour side face down and the uncoated side face up. When someone "tells a fortune", they first ask the new zodiac sign, then pretend to sort out the sign, secretly turn over a sign that matches the new zodiac sign and the time, so that the fragrant face is up, and the wenbird immediately takes out the sign and watches the birds perilla and millet.