Americans addicted to Amazon may soon be courted by a Chinese tech giant most of them have never heard of. Pinduoduo plans to expand its reach in the United States next month, according to reports in Bloomberg and Reuters. The company is known for delivering goods at rock-bottom prices while holding its employees to terms that a prominent labor activist says should horrify Americans. Described by its founder, former Google employee Colin Huang, as a cross between Costco and Disneyland, Pinduoduo has rode a wave of meteoric growth in Chinese technology to become one of the largest e-commerce companies in...