When your dog sits, hold the food in front of his nose and let him smell it.

Slowly move the food far away so that it can see it but cannot touch it, and guide the dog to stand up. Once your dog stands up, reward him with the food in his hand.

Then add commands and gestures to gradually become familiar with this training.

When the dog completes the action, don’t forget to give a snack as an encouragement immediately.

PS: The action of "standing" can easily cause injury to the dog's lumbar spine, so do not let the dog stand at attention for too long or continue to stand at attention for too long.