First, in the settings, check to turn off age increase. But then others won't get old.

Second, if you eat the immortal food, you can know the age and date at this stage, that is to say, if you eat it on time, you can live forever. However, making fairy dishes is more troublesome, requiring 10 cooking and learning recipes; Fishing 10 level, go to the cemetery to catch dead fish from 0 pm to 3 pm; Gardening 10, looking for special seeds and growing fruits of life.

Third, hold down Ctrl+Shift+C at the same time, and enter testingcheatsenabled true. Then select the villain, hold down Shift, click on the villain (or click on your email, I forgot a little), and modify the Sims in the creation mode. When the villain is old, he can be replaced by a young man.

But the above methods can only place natural deaths. In order to prevent accidental death, you must carry the flower of death with you.