sth. one knows well and can manage with ease
It's a Chinese idiom. Pinyin is Q à ngch à sh ú D à o, which means to do something familiar and easy. From xufanting's Moganshan.
Idiom explanation
I am familiar with something and can do it easily.
The origin of Idioms
Xu Fanting's "Mogan mountain" says, "I'm familiar with the way to find autumn, and I'll go to Lin'an with my friends in the afternoon."
Idiom usage
It is easy to do things
sth. one knows well and can manage with ease
thump one 's chest and stamp one 's feet - chuí xiōng dùn jiǎo
The veteran soldiers are defeated - shī lǎo bīng pò