What is the meaning of "walking as fast as flying"?

Sprinting away as fast as flying: a four-letter word for walking at a fast pace, as fast as flying.

Sprinting away: leaving quickly; walking fast, running fast.

Citation: Song Dynasty - Ouyang Xiu, "Autumn Sound Fugue": and as the soldiers going to the enemy, with their arms in their mouths, walking fast, not hearing the orders, but hearing the sound of the march of men and horses.

Translation: The sound of clanging on an object, as if it were the sound of metal striking, and then (carefully) listening to it, it was like an army going to attack the enemy, not hearing any orders, but only the sound of men and horses marching.

Citation: Mao Dun, "The Night of the Son," 19: " Wu Sunfu's whole body shivered. He walked briskly through the house with an iron face and clenched teeth."

Example sentence: Some qi refining masters, condensing the body qigong attached to the heel, can be dragon-walking tiger, sprinting like flying.

Expanded Information

Near synonyms:

健步如飞? [ jiàn bù rú fēi ] Jianbu: fast and powerful footsteps. The pace is robust, running fast.

Citation: Jiang Fangzhou, "The Man Who Walks Like a Fly in the Darkness": A thoroughly honest man, like the man who walks like a fly in the darkness, has only one voice inside. The exhortations of others, the vanity of the world, the temptations of life, the coercion of power, all these things cannot enter the ear and the heart. When a man seeks something, he sees only what he seeks.

Example sentence: This old man is over seventy years old, but he is still as fit as a fiddle.

Antonyms:

Striding? [ bù lǚ pán shān ] hobbling: walking with a limp. It describes walking with an inconvenient, crooked leg.

Citation: Tang Pi Rixiu, "Poems on Taihu Lake - Shang Zhen Guan": "Tianjun chirps loudly, and Tianlu walks hobblingly."

Translation: the music resounds (with) a grand sound, and (Tianlu, a legendary) divine beast walks staggeringly.

Example sentence: the old woman walked on her crutches along the mountain path, the firewood on her back making her hobble.