Microsoft is closing the version of its LinkedIn professional networking site that operates in China, The Wall Street Journal reports. LinkedIn said the decision came after it faced "a significantly more challenging operating environment and greater compliance requirements in China." In May, LinkedIn was among applications found by the Cyberspace Administration of China to have "improper data collection." U.S. technology companies, including Facebook and Google, have told the Hong Kong government that planned changes to data protection laws could lead them to stop offering services there.