Longgang held national road and track cycling race and there is a large bicycle production center, I guess you can find a lot of bike accessory stores here.

Hi,I'm a Chinese in Shenzhen, if you need help . You can contact me. panjun at yadex . com

I won't be able to help much........There is a large sporting goods chain...can't recall the name............They might have fishing equipment.............though I don't recall much being anywhere......most fishing in China is quite simplistic. Try the GIANT bike store and sporting goods stores for bike stuff. Chinese don't dress up their bikes much, so you may not find much.