Shanghai has fabric markets and you can find silk there. There is a big one in South Bund (South Bund Fabric Market), nearby Nanpu Bridge subway station. Not far away opposite this market, that is Wangjia Matou Silk Fabric Market. As to pearls, there are such kind of markets in Shanghai. Hongqiao International Pearl City is loated in 3721 Hongmei Road, Changning District.