Talk big
Chinese idiom, Pinyin is Ku ò L ù ng ā ot á n, which means to make a lot of comments. It comes from huizongzhaihui written by Lu Yan of Tang Dynasty.
explain
Broad: broad; high: deep. Most of them talk out of bounds.
source
In Huizong zhaihui written by Lu Yan of Tang Dynasty, "if there is no one to talk about, it's a pity that Mingjun doesn't meet the truth." I want to be a talented man with a good look. Zeng Rui, Yuan Dynasty
Talk big
great pains taken in working out a scheme - kùn xīn héng lǜ
like the palm of one 's own hand - míng rú zhǐ zhǎng
retire and give room to better men - bì ràng xián lù