Analysis of information sources in references of the Wikipedia article "Trịnh Hiểu Tùng" in Vietnamese language version.
There is no evidence that Mr Zheng had come under the watch of China's pervasive anti-corruption campaign. However, hundreds of mid-level Chinese officials who had been accused of graft have died in recent years - reportedly by killing themselves, though observers have questioned these accounts.
There is nothing to suggest that Mr Zheng had come under the watch of China’s anti-corruption crackdown, although a number of Chinese officials who have done have died in suspicious circumstances.Agencies contributed to this report.