A man on China's list of 100 most wanted corruption suspects abroad has voluntarily returned to China from Canada where he fled in 2011, the government said Wednesday, as Beijing keeps up the pressure to return such people to the country.

China has been trying to get increased international cooperation to hunt down suspected corrupt officials who have fled overseas since President Xi Jinping began a war against deeply rooted graft more than three years ago.

But Western countries have been reluctant to help, or sign extradition treaties, not wanting to send people back to a country where rights groups say mistreatment of criminal suspects remains a problem, and also complaining China is unwilling to provide proof of their crimes.