The sentence structure of this sentence is adverbial postposition, and the normal word order is "applied in the sense of filial piety"

1. The phrase "strictly observe filial piety" comes from my country, which means setting up school education carefully and telling people the truth of filial piety repeatedly.

2. Post-interpretation of adverbials: In modern Chinese, adverbials are placed before predicates, and if they are placed after predicates, they are complements. But in classical Chinese, adverbs, adjectives, verb phrases, subject-object phrases and so on. Used after the predicate. If there is an object after the predicate, it is used after the object. It is a monosyllabic word with no phonetic pause in front and no comma when writing; It is a polysyllabic word or phrase, preceded by a phonetic pause, and separated by commas when writing. In a sense, it modifies and restricts the predicate, that is, adverbial postposition.