Automakers are betting that Chinese families will embrace the mini-van, hoping the larger, unsexy sibling of the bestselling SUV will become the next big thing just as Beijing relaxes the one-child policy. Mini-vans, or multi-purpose vehicles (MPVs), were front and center at the Guangzhou auto show, where Volkswagen AG presented a supersized version of its Touran and Guangzhou Automobile Group subsidiary GAC Motor showcased a prototype mini-van.