Dǎzhé cùxiāo huódòng yī kāishǐ, gùkè biàn fēngyōng ér zhì.
As soon as the sale started, customers flocked in.
Tips
memory
蜂 = bee, 拥 = to swarm / crowd, 而 = and then, 至 = to arrive. Picture a swarm of bees descending all at once — that captures the chaotic, sudden mass arrival perfectly.