1. these two places are all a lit far from subway stations, it is around 3 km from Zhanqian Lu to these places, better take taxi, that's very conveniet.
2. For watch, there are several watch market around Zhanxi Road. For sports jersey, you can also go to Guangzhou Railway Station area. For China Silk, there is no specilized market, the best market for silk is in Hangzhou, China.