Because after Hong Kong was captured by the Japanese army during World War II, many terms were used in Japanese, and one of the terms "world leader" was the origin of the "old world".

A world leader is the head of a family. When the Japanese army checked the household registration, the translator shouted at the door: "The world leader came out", that is, the head of the household came out. Guangfu people like to add the word "old" to their titles.

For example, cousin, brother … and reducing the abbreviation of "world leader" and adding an old word to make the world old. After the victory of the world anti-fascist war, the common name of the boss was preserved in the old world.

Extended data:

Address forms in Cantonese

Big brother (younger brother), little brother (younger brother), uncle (daughter-in-law) and grandson (grandson)? Zaizai (son)

Daughter Ye Qi (michel platini) Zizi (adopted son)

Widowed (bachelor) son (son) daughter (daughter) stepmother (stepmother) prince (young boss) brother (illegitimate child) offspring (young boy) offspring (young girl) handsome boy (beautiful boy)

Pretty girl (pretty girl) Alley (child) Mosquito (child) Shrimp (baby) Messenger (beater) Boss (boss's wife)

Sister-in-law (sister-in-law) Grandpa (grandfather) Aunt (grandfather) Grandma (grandmother, old woman) Uncle (uncle)

Lao Dou (Dad), Ma Lao Zi (Mom) and Jiajie (Sister).