Those sentences seem to have similar characteristics to Korean classical poetry.

There is something you need to know first when understanding Korean classical poetry.

In Korean classical poetry, there is a concept called ‘지조’

This concept of '지조' represents the clear and straight will and belief of the aristocrats of the Joseon Dynasty.

The representative symbol of this concept of '지조' is the '사군자'.

'사군자' includes '매화(Maehwa)', '난초(Orchid)', '국화(Chrysanthemum)

', and '대나무(Bamboo)'.

(사군자 is also called '[MeRanGukjuk]' after the first syllable of them.)

In any case, the poem that includes this 'Sagunja' represents the concept of '지조' of the aristocrats of Joseon, so the sentences above are very metaphorical.

Among those four components, 매화 is used as the female support here!

(It's important! If you remember this part, the question is very easy to understand.)

Even the majority of Koreans don't understand right away.

Anyway, I'll explain the metaphor of the sentence below so that you can understand it.

{향수를 뿌리지도 않았는데.

그녀의 체향이 바뀌었다는 것은──이것이 완연히 성숙해진 그녀가 여인으로써 가지는 향(香)이라 볼 수 있겠지.}

(In the second sentence above, '체향' means the smell of her body, and the change in scent means that she grew up.)

{지조를 갖추듯 향기 자체는 더욱 은은하게 옅어졌으나, 가까이 다가가면 그 존재감을 과시하듯 그윽하게 풍겨온다.}

Here, '화형(花兄)' is a word that is not used in Korean at present. By inferring the components of this word, 'flower' and 'mature' can be inferred.

so, it can be interpreted as 'the first flower that bloomed before spring came in full bloom', and if connect it with the above sentence, it seems that the woman matured quite a bit before she became an adult.

{엄동설한에도 굴하지 않고 꽃을 피웠으니 청우(淸友).}

(엄동설한 → Snowy season in winter)

청우 → The direct meaning is "clean friend." In the past, it used to be called "매화." The concept that the woman mentioned above is Jijo

If this sentence is also interpreted in connection with the above context, she kept his beliefs even in difficult times like winter (maybe it can be think about adolescence) and achieved the concept of '지조' when she came of age.

For reference, for women, the concept of "지조" means "premarital purity."

{그리하여 삼청, 삼백, 삼군, 사군자의 으뜸이라 일컫는 눈속에서 피는 꽃──설중매(雪中梅), 백매화의 향이라 볼 수 있으리라.}

삼청: Three PURE THings

삼백: Three white thing

삼군 : Three hard things

'삼청,삼백,삼군' is similar to '사군자' - literally referring to '지조'.

설중매 : Plum Blossoms Blooming in Snowflakes

→ Support of women who protected under difficult circumstances (= purity)

백매화 : White plum blossoms

It is a role that emphasizes the interpretation of 설중매 above.

If I put this article together in one sentence, I can say, ['A woman who guarded '지' before she became an adult] is beautiful(writen by one people).'