Abduction

Xiao Jianhua is one of several high-profile Chinese businessmen to go missing since China’s 2015 stock-market crash

The uncertain fate of Xiao Jianhua, a China-born billionaire who was last seen at a luxury Hong Kong hotel a week ago, has raised fresh fears about the city’s autonomy amid media reports he may have been abducted by Chinese agents.

Almost two million people have joined in an online debate, with many voicing anger at the lack of help from others.

Recent months have seen an unprecedented expansion of China’s power to snatch up detractors across borders.