Finally, another "rumor" comes true: The mayor of Nanjing, Jiangsu province, is under investigation for alleged economic misconduct.

Seniority-wise, a Nanjing mayor, equivalent to a central-government vice-minister, may not necessarily qualify as the "tigers" Party leader Xi Jinping referred to in his remarks on the anti-graft campaign.

Still, the investigation is a well-received follow-up to Xi's promise that the crusade against corruption will not just target "flies". At least in Nanjing.