Personally, I have had the experience of giving gifts like this more than once:
In today's real society, politeness travels all over the world, and rudeness is hard to move. No matter all walks of life, if you want to do better and have a good development prospect, you can't do without the topic of gifts.
I remember when I was working in a food factory, there was a vacancy for deputy director of the workshop in the factory. There are about 5-6 candidates, and the competition is fierce. In order to win the first prize in the competition, I can only secretly send two boxes of liquor, two cigarettes, a tea set and some cash to the big leader. This is not only the cultivation and reuse of previous leaders, but also for this election.
Good intentions are rewarded. Through my series of efforts, I finally realized my ideal and successfully became the deputy director of the workshop.
What I want to say is that when you need to give gifts, you must not be stingy. This is the way to survive in the workplace, and sometimes you have to do it even if you don't want to.