a cloudless blue sky
As a Chinese idiom, Pinyin is B ì K ō NgR ú x ǐ, which means the blue sky is as clear as it has been washed. It describes the weather as sunny. It comes from Song Dynasty Zhang yuangan's water tune song.
The origin of Idioms
In Song Dynasty, Zhang yuangan's poem shuidiaogtou: "thousands of miles are clear, the moon is bright, the curtain is rolling and the jade is flowing."
Idiom usage
At that time, a group of geese and geese were flying through the sky in the form of characters. --Shen Congwen's long river autumn
a cloudless blue sky
The dike of a thousand miles is destroyed by the ant nest - qiān lǐ zhī dī,huǐ yú yǐ xué
cast its radiance far and wide - guāng yàn wàn zhàng
give a person bellyfuls of fisticuffs - bǎo xiǎng lào quán