the four borders of ancient China; (by extension) the whole world; the entire country
generous
(colloquial) loyal to one's friends; straightforward and generous in character
four seas
(Traditional Chinese Medicine) a collective term for the four reservoirs of the human body: the sea of marrow (髓海suǐhǎi), the sea of blood (血海xuèhǎi), the sea of qi (气海qìhǎi), and the sea of water and grain (水谷之海shuǐgǔzhīhǎi)
