Zhu Hengpeng, who worked for an influential government thinktank, has reportedly not been seen in public since making disparaging remarks on WeChat

A leading Chinese economist at a government thinktank has reportedly disappeared after being disciplined for criticising Xi Jinping in a private chat group.

Zhu Hengpeng, 55, is believed to have made disparaging remarks about China’s economy, and potentially about the Chinese leader specifically, in a private WeChat group. Zhu was subsequently detained in April and put under investigation, according to the Wall Street Journal which cited anonymous sources.