Guo Meimei, the 23-year-old woman whose online posts unfairly tarnished the reputation of the Red Cross Society of China three years ago, was formally arrested on a charge of operating a gambling house, the Beijing Dongcheng district people's procuratorte said on Wednesday.

On July 9, Beijing police uncovered an Internet soccer gambling gang, allegedly headed by Guo, during the World Cup, and arrested eight gamblers.

The police accused the criminal gang of opening accounts in overseas gambling websites and betting through phone calls and WeChat. Guo was also on suspicion of involving in sex trade.