Spatial inequality of shopping opportunities under the boom of express deliveries in China

•The number of express delivery outlets is growing faster than the number of traditional shops.•The net ecosystem services provided by express delivery outlets are 3-fold those of shops.•The spatial distribution of express delivery outlets is wider and more equal than that of shops.•Online shopping reduces the spatial inequality of shopping opportunities by 35%.•Spatial inequality declined with the increase of city's economic level and population size.