老骥伏枥 (老驥伏櫪) lǎojì fú lì

lǎojì fú lì set phrase an old steed in the stable still aspires to gallop 1000 miles; aged person with great aspirations
Domain: Idiom 成语
Notes: (CC-CEDICT '老驥伏櫪')

Also contained in

老骥伏枥,志在千里