HSK10+
lǎojìfúlì
lit. an old steed in the stable still aspires to gallop 1000 miles ; fig. aged person with great aspirations
老骥伏枥 (老驥伏櫪)
lit. an old steed in the stable still aspires to gallop 1000 miles (idiom); fig. aged person with great aspirations
CC-CEDICT