From the first point of view, if your relationship with the newcomer is a mentoring relationship, then this relationship is actually close, or the responsibility is greater. After all, the newcomer calls you master, not only from this industry, but also from you. You should at least teach him what you know. Besides, you should be kind to others. If you are a newcomer who just came out of school, you may have to tell him some social truths. So if you and the new person are just colleagues at the same level. Moreover, he has worked in other companies. If he is not obliged to take him, just tell him a little about the company's regulations or procedures.
The second level is actually more important. Whether you are willing to teach depends on whether the newcomers are willing to learn. At the same time, whether the newcomers have a strong thirst for knowledge, or whether they respect you at ordinary times, or how are the newcomers? If the newcomers respect you, then you may teach faster. If it's just ordinary now, it may not be necessary to give it to him.