Complex sentence: Pongee is still woven in silk by many mills across China, especially along the banks of the Yangtze at mills in Sichuan, Anhui, Zhejiang and Jiangsu provinces.
Split into simpler sentences: Pongee is still woven in silk by many mills across China. It is particularly woven along the banks of the Yangtze by mills in Sichuan, Anhui, Zhejiang and Jiangsu provinces.