By all accounts, China’s ecommerce market is booming. Chinese customers spent more than $670 billion online in 2015, a more than 40 percent increase from 2014. That trajectory is expected to continue as online consumption grows by 20 percent annually through 2020, thanks to an expanding base of 410 million online shoppers. That strong growth rate is expected to propel ecommerce sales well beyond the $1.5 trillion mark by 2020.
In China, mobile buyers already...