China's top cybersecurity regulator is vowing to crack down on "illegal" online content as part of a campaign to clean up the internet ahead of the Beijing Winter Olympics and one of the country's most important annual holidays . The Cyberspace Administration of China announced Tuesday that its month-long internet "purification" campaign is intended to create a "healthy, happy, and peaceful online environment." The powerful internet watchdog — which President Xi Jinping set up in 2014 in the name of protecting China's internet and data security — tied the campaign to the start of the Lunar New Year, a major…