“Pusa” is short for “putisaduo”, the Chinese transliteration of Bodhisatta. Briefly, any one who cherishes the lofty aspiration to deliver oneself and all beings from misery and sufferings, and attain ultimate happiness (salvation of oneself and of others),

 and to release oneself and all beings from ignorance into perfect enlightenment (self-enlightenment and enlightenment of others) is called in Chinese “Pusa”, i.e. Bodhisatta.