I wish to know where is the wholesale markets for sports equipment in Guangzhou.

South China International Trade Center of Stationery and Sporting Goods is a good choice for you. There are many shops that sell kinds of sports products. You can go and see. The location is no. 44, Nan'an Road, Liwan District.
About the transportation, you can take subway line 5, get off at Xichang Station, Exit A. Then walk southwest around 0.7 miles (1.2km) to find the destination.

This is a very good reply dear..
I followed a very difficult description lastly and times went to look for a market and with many difficulties when I arrived there this week, it is now a ghost market..