Want to know what dad means?

Dad is Chengdu's name for his brother-in-law, who is his youngest brother.

In some dialects, especially in Southwest Mandarin, "Yao" means "the smallest one" and "the last one". For example, "Mother Mo Zhi" means "Little Finger", in Mahjong, "Moji" means one, and Yao Er or Yao Nv is the youngest son or daughter, and so on.

Language features:

Southwest Mandarin is a dialect of Mandarin gradually formed from the Ming Dynasty due to immigration to the southwest, and immigration is the main factor in the formation of Southwest Mandarin. It is generally believed that Southwest Mandarin is an extension of Jianghuai Mandarin, and they are related and belong to Southern Mandarin, but the academic circles are cautious about this view.

Sichuan is one of the earliest areas where Han migrated to the southwest. Sichuan was the land of Bashu in ancient times, with fertile land and peaceful geography. The Han nationality first moved here after Qin unified Bashu (about 30 BC1year).

From the Qin Dynasty to the Song Dynasty, Han people moved to Sichuan to avoid wars and natural disasters. Such as the Huang Chao Uprising in the late Tang Dynasty. The route of Han people moving into Sichuan is mainly crossing the Qinling Mountains, so the main body of immigrants is Han people in the Central Plains (mainly Gansu and Shaanxi). At that time, the southwest dialect was mainly northern mandarin.