Sister, female, refers to the boss, leader, leader, leader and so on. But different places have different meanings, such as Yulin City, Guangxi. In Yulin, sister means fool and fool. It means the same as brothers, except that brothers are for men and sisters are only for women.
In recent years, the words "elder brother" and "elder sister" have become more and more common, and it is not difficult to find examples of their use in mainstream newspapers and ordinary secular tabloids.
In the past, people generally thought that it was a phrase obtained by directly modifying nouns with numerals. Because numerals usually precede nouns with quantifiers, people often think that they omit a quantifier. In other words, "a brother" is "a brother" and "a sister" is "a sister".
Now, "a brother" and "a sister" have specific lexical meanings. "Elder Brother" refers to the male individual or group that occupies the primary position or has the first-level control right in the male-dominated field, and correspondingly, "Elder Sister" refers to the female individual or group that occupies the primary position or has the first-level control right in the female-dominated field.
The source of "one elder sister"
The direct source of "elder brother" and "elder sister" is not "elder brother" and "elder sister" as phrases, but Cantonese dialect.
The Dictionary of Modern Chinese Dialects notes "Yi" in Cantonese in Guangzhou and Dongguan. In Guangzhou, "one" has two meanings: one is the person who wants to be a leader; First, talents, good winners.
In Dongguan, the meaning of "one brother" has two meanings, one is a joke to the head of a certain unit or department, and the other is a person who is competitive and never gives up. The Chinese Dialect Dictionary (all five volumes) also includes the word "Yi", which means Cantonese, and is interpreted in Dongguan Cantonese.
The economic prosperity in the south and the influence of Hong Kong's economy and culture have contributed to the strong spread of Cantonese dialects, and some Cantonese words have become common words for the whole people. It is also with this trend that "one" has become a homonym.