Are there any piece-rate shoe factories in Zhuhai?

Yes. According to Baidu Map query, within the jurisdiction of Zhuhai City, there are two shoe factories, Xutai Shoe Factory in Jinwan District, Zhuhai, and Meixing Shoe Factory in Xiangzhou Cuizhu Industrial Zone, which implement the piece-rate wage system. Zhuhai, a prefecture-level city in Guangdong Province, is located in the southwest of the Pearl River Estuary in Guangdong Province. It faces Hong Kong, China across the sea to the east, is connected to Macau, China, to the south, is adjacent to Xinhui District of Jiangmen City and Taishan City to the west, and borders Zhongshan City to the north. The city in the Pearl River Delta has the largest ocean area, the most islands, and the longest coastline. It is known as the "City of One Hundred Islands".