lit. mythical bird Jingwei tries to fill the ocean with stones (idiom); futile ambition / task of Sisyphus / determination in the face of impossible odds
to guard / to protect / to defend / abbr. for 衛生|卫生, hygiene / health / abbr. for 衛生間|卫生间, toilet / surname Wei / vassal state during the Zhou Dynasty (1066-221 BC), located in present day Henan and Hebei Provinces