Happy swallow
Yitangyanque, a Chinese idiom, Pinyin is y í t á ngy à nqu è, which means that birds live in comfortable halls. It refers to a person who is in danger and doesn't know it. It comes from Cheng dengji's "learning from qionglin in childhood".
The origin of Idioms
The fourth volume of Cheng dengji's "learning from qionglin in childhood" is: "a bird in a pleasant house knows no aftereffect; a chicken in a jar is widely seen.
Idiom usage
As an object or attribute; used in figurative sentences
Happy swallow
A thousand steps are changing with each passing day - rì zhuǎn qiān jiē
overindulge oneself in wine and women - chén miǎn jiǔ sè