First of all, after Keji eats food for about 20 minutes, the owner needs to urge Keji to excrete in a fixed place, and then give Keji some snacks as a reward. Through repeated training, Keji can form a conditioned reflex. Secondly, if Keji urinates anywhere during training, he should raise the volume and scold Keji to let him know that this is wrong.
Owners can buy toilets for dogs and train dogs with odor inducers.