Dear friend,you can go to Hardware wholesale market like Guangzhou huancuiyuan hardware wholesale market(广州环翠园五金批发市场).

I just wasted half day going to this hardware market you recommended. Stay AWAY! It's dirty enough to make you faint, the shops are rotting away with no windows no A/C and so on - there's a similar market in Chebei just near the subway station, still dirty and not much to see but not as derelict and purulent as huancuiyuan.