“At a Catcher Technology Co. manufacturing complex in the Chinese industrial city of Suqian, about six hours’ drive from Shanghai, workers stand for up to 10 hours a day in hot workshops slicing and blasting iPhone casings for Apple Inc., handling noxious chemicals sometimes without proper gloves or masks,†Bloomberg News reports. “These conditions — some described in a report Tuesday by advocacy group China Labor Watch and others in Bloomberg News interviews with Catcher workers — show the downside of a high-tech boom buoying the world’s second-largest economy. Chinese recruiters play up the chance to build advanced consumer electronics...