talk irresponsibly
Chinese idiom, Pinyin is sh ǔ Hu á NGD à ob á I, which means to add comments behind the scenes and slander others wantonly. It comes from Ling Mengchu's the first time to make a surprise.
Idiom explanation
Make comments behind your back and slander others wantonly. It's the same as "the number of immortals".
talk irresponsibly
The meaning comes from the text - yuán wén shēng yì
not give serious thought to anything - wú suǒ yòng xīn