Wal-Mart Stores, Inc. is getting a makeover. Its new name: Walmart.

In less than a decade, China has emerged as the world leader in e-commerce. It claims more online shoppers than any other nation. The numbers speak for themselves.

When drug company chief executive Heather Bresch was hauled in front of Congress last year to defend the high price of lifesaving EpiPens, she drew skeptical lawmakers’ attention to a large poster board that blamed the skyrocketing price tag on a coterie of drug supply chain middlemen. Of EpiPen’s $608 list price, her company, Mylan, received only $274, Bresch said.

Amazon quietly began operations in Australia this month, the start of what could be a shake-up of that country’s retail market, which is worth hundreds of billions of dollars.