in the four seas and nine regions -- in the whole country
The synonym sihaijiuzhou generally refers to jiuzhousihai, Chinese idioms, Pinyin is Ji ǔ zh ō us ì h I, meaning still speak the world, generally refers to the whole of China. It's from the song of Dengfeng.
The origin of Idioms
In Tang Dynasty, Lu Zhaolin's song of Dengfeng, it is said that "nothing happens in Jiuzhou and all over the world, and you will be happy forever."
Idiom usage
Used as an object or attribute; used in writing. However, it is pure and virtuous, and the imperial court has a great discussion on it. Wang Anshi's Xianggong book of the upper Song Dynasty
Chinese PinYin : sì hǎi jiǔ zhōu
everywhere
an inch of silk and half a grain of rice -- a little bit. cùn sī bàn sù
the clouds melt and the mists disperse. yún xiāo wù sàn