How to teach a cat to use cat litter

You can place the cat’s urine and faeces in the litter tray, so that the smell of the cat’s excrement remains in the litter tray; furthermore, when the cat has the desire to defecate, if there is a squatting and tail-crossing action, bring the cat to the litter tray immediately and wait for the completion of defecation and urination, then pick up the cat’s front paws to shave the cat litter to cover its excrement and repeat this action to allow the cat to form a habit.