SHENZHEN, China—Foxconn, which was plagued by worker suicides a few years ago, has denied a report that a female employee jumped from the roof of one of its assembly plants here last week.

GUANGZHOU, China—In an irony of China’s growing middle class, factory jobs go begging while many educated young workers are unemployed or underemployed. A national survey of urban residents showed that among people in their early 20s, those with a college degree were four times as likely to be unemployed as those with only an elementary school education.

HUIZHOU, China—Assemblers are logging 12-hour days to churn out the latest handsets at Samsung Electronics’ factory here.