How to correctly recognize the relationship between Christian faith and traditional Chinese culture

This is normal. Many Christians are like this.

First of all, we have to see whether the traditional Chinese culture is correct or incorrect; if it is correct, it is OK to learn it in spite of it. If it is incorrect, such as some backward ideas, it is OK not to learn them.

Every culture has its essence and dregs, and Christians are just like anyone else in this regard: the essence is absorbed, and the dregs are rejected, so there's nothing wrong with that.

The festivals such as Ching Ming and Dragon Boat Festival are really related to superstition, such as Ching Ming ancestor worship, Dragon Boat Festival Qu Yuan worship, and Mid-Autumn Festival Moon Sacrifice, which are purely superstitious activities, and it is better not to participate in them. Christians can honor their ancestors, but they don't have to worship them, and they can honor Qu Yuan, but they don't have to worship him. This is very simple.