Why do garment factories recruit so many people this year?

There are clothes makers in Qingdao, but they are not in the urban area, but in the county-level cities below. There are large leading enterprises such as Ji Fa Group in Jimo, and many small and medium-sized enterprises in Jiaozhou make clothes. The salary level also depends on technology and efficiency. I heard that this business is all about basic salary plus piece rate. I guess more than two thousand is the bottom line, right?