Modify the sick sentence: Why is this sentence wrong? "By making zongzi for the Dragon Boat Festival, we can enrich our understanding of traditional culture."

This is a common question type in the senior high school entrance examination, which mainly examines students' mastery of several kinds of sick sentences.

Etiology: Misuse of prepositions leads to incomplete components.

Analysis: the abuse of prepositions will form an object-object phrase with the subject, which can only play the role of adverbial and complement, so the subject will be incomplete.

It can be changed to:

This activity of making zongzi on Dragon Boat Festival can enrich our understanding of traditional culture.

Or:

Through this activity of making zongzi on Dragon Boat Festival, we have a rich understanding of traditional culture.

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