To build prototypes for the indoor farm at SH, Michelle went to the hardware store down the road, to purchase everyday materials such as PVC pipes and tubings. Sold in lengths of 3m long, she got quite a few stares from neighbors trying to cross the road while balancing these pipes on her shoulder!
Shenzhen Maker Tips Chinese construction stores have everything you need! It might be a few RMB more expensive than Taobao, but you can preview the material, get cheap delivery, and also send interested makers to the same store to get a first hand look at the materials for their own project ideas.