How to treat people who like to kiss up to others in interpersonal communication?

People who like flattery may not be recognized by colleagues or peers, but they may be recognized by leaders. Now there are always a few people in the company who like to kiss up, and some people are developing well. Some people say that "flattery is an art and fear of flattery is also a skill", but the reality is the same. Such people are often handy in interpersonal communication and can cope with various occasions.

Now "flattery" is no longer a derogatory term, which also shows that this person will come and meet in interpersonal communication, which is also a manifestation of adapting to the environment. People who like flattery, as long as they don't harm the interests of others, just want to be recognized by others, is not necessarily a bad thing.

One of my colleagues likes to kiss up to the leader. Many colleagues in the company don't like to associate with him, but the leader is still very kind to him. He always grasps the leader's psychology and says something that the leader likes to hear, which makes the leader feel particularly happy.