What if the dog is locked in a small room and will go to the toilet by himself+once he runs around the house, he will urinate everywhere?

How to train dogs not to defecate casually

You can get some waste newspapers, get them wet when he pees, then put them where you want him to pee, hold him in the past, point to that place, let him smell them with his nose and tell him, "pee, pee here!" " ".Because he is still a minor, his urine bubbles are small and he can't hold back so much urine. I'm about to pee. I can pee seven or eight times a day. He will remember it after a few more trainings.

When he is pulling casually, you can pick him up quickly with a newspaper in your hand and send it to your designated place together. When he's finished, tell him, "Pull it here". If he doesn't pay attention, pull the poop out, hold it in his arms, hold his back neck with his hand, put his nose close to the poop and let him smell it for a while, pat his forehead with his hand, and he will scream in fear, then hold it to the designated place, tell him, "Pull it here", and gently touch him with his hand to let him know that this is the right thing to do. It is an adult dog after 7~8 months and has matured. Take him out three times a day (morning, noon and evening) to solve his convenience problem, so that he won't pee anywhere at home. After a long time, he will learn to hold his urine and will not defecate anytime and anywhere.

Thank you for taking it as a satisfactory answer.