Lowest priced e-bike in China is an awful piece of crap from Tianjin area for about RMB 700-800. Breaks down within months.
Just do the math for a decent quality e-bike. Based on SLA battery, the battery is RMB 500-600, controller + motor = 500, frame +bike parts RMB another 600, so under RMB 1600-1700 ex-factory (probably around RMB 2200-2500 retail taking into account the thin margins they make) it's basically sall crap that you buy. Based on Li-on battery and better electric system, no good ones ones under RMB 3000 (36V, 10 Ah versions). Only top end of Carrefour stuff is reasonable, rest is crap.