Be generous when making friends. Because I think everyone should broaden their social circle now, so as to make good use of the resources around them, because they can help you when you design things. It shouldn't be confined to stimulating a small corner around me, so I think it's ok to make friends widely. The network is wider, and it can also be used in future work. I think if it's a heart-to-heart, it's possible that you two will have many contradictions. Then I will make myself feel particularly uncomfortable, so I will make friends.