From what I read, the Wellgo SPD are a bit hard to unclip from, so they're not recommended for newbies. That would mean the mecanism used by Wellgo would be closer to Shimano's SH51 than SH56. Do experienced riders confirm?
Besides, Wellgo QRD pedals are very hard to find: There are only a couple of models on eBay or AliExpress.
QRD - Wellgo
As an alternative, you could get some flat QR pedals and add straps like those from
PowerGrips.
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Edit: Out of curiosity, do those pedals use the Time or Look system, and would they be easy to unclip from?
http://www.ebay.com/itm/Wellgo-QRD-R...-/142242598826