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.

SHENZHEN, China—China Labor Watch has discovered child labor at HTNS Shenzhen Co., an assembly plant that makes Samsung cell phones. This comes just two weeks after Samsung stated that it did not find any child workers while auditing the factory in September.

HUIZHOU, China—A Chinese supplier for Korean electronics giant Samsung uses children to make its products, hits workers on the factory floor, and punishes workers who make mistakes by forcing them to stand all daylong or write “self-criticism” reports, according to a labor advocacy group.

PALO ALTO, CA—A man who bought an HP laptop found an unexpected file on the machine’s hard drive: a video showing life on the Chinese assembly line where the computer was made.