HSK 7-9
千军万马
qiānjūn-wànmǎmagnificent army with thousands of men and horses (idiom); impressive display of manpower; all the King's horses and all the King's men
人潮如千军万马涌向广场。
Réncháo rú qiānjūnwànmǎ yǒngxiàng guǎngchǎng.
The crowd surged toward the square like a vast army.
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Appears across levels (7-9) in the HSK 3.0 word list.