It's a piece of cake
As a Chinese idiom, Pinyin is R ú sh í D ì Ji è, which means like picking up a piece of grass from the ground. It comes from the biography of Xia Hou Sheng in the history of Han Dynasty.
The origin of Idioms
"Xia Hou Sheng Zhuan" in Hanshu: "scholars' diseases are not clear about Jing Shu, Jing Shu is not clear about Jing Shu, and its color is blue and purple, which is just like picking up the ears of weeds."
Analysis of Idioms
[synonym]: easy [antonym]: more difficult
Idiom usage
It's very easy to get an example. It's green and purple, just like picking up weeds. It's lazy and useless. It's ten rooms and nine. Nan Dynasty · Liang · Ren Yansheng
It's a piece of cake
to catch a thief you must find the stolen goods - zhuō zéi zhuō zāng
spread embroidered stories and malicious gossip - fēi duǎn liú cháng