be able to perform wonders
As a Chinese idiom, the Pinyin is di ǎ NSH í w é ij ī n, which means to use a little finger to turn a stone into gold. It's from "a warning to the world · Lu Dalang's return of gold and flesh".
The origin of Idioms
"Four wishes to get the finger of Lu Chunyang's grandmaster to turn stone into gold."
Idiom story
There was a child whose family was very poor, but he was very filial to his mother. LV Dongbin sympathized with him so much that he gave it to the child by lighting stones with his fingers. The child shook his head and said, "I don't want gold." Lu Dongbin asked in surprise, "what do you want?" The child said, "I want your finger, because the gold you gave me will run out, but with your finger, when there is no money, you can turn stone into gold!"
be able to perform wonders
as the arm directing the fingers -- command with ease as one wishes - rú bì shǐ zhǐ