Be meticulous in speech and smile
In Chinese, Pinyin is B ù g ǒ uy á nxi à o, which means not to talk and laugh casually. It describes a serious and solemn attitude, which is the same as "not to talk and laugh casually". It's from the second moment of surprise.
The origin of Idioms
"The second moment of surprise" Volume 2: "miaoguan change to the teacher's self-esteem, make-up model as a sample, all self reserved, meticulous
Idiom usage
Used as a predicate or attributive; used in writing. I also heard that American schoolchildren should be cautious every step of the way. Liang Qichao's general comments on Reform on preschool education
Be meticulous in speech and smile
Take advantage of the light and drive the fat - chéng qīng qū féi
Half understanding and half knowing - bàn jiě yī zhī
If Haoli does not cut, he will use axe - háo lí bù fá,jiāng yòng fǔ kē
To help the world and the people - fǔ shì zhǎng mín