Until recently Yu Faxin was best known as a leading scientist and entrepreneur,
specialising in advanced semiconductors for military applications.
But on September 22nd he made headlines for another reason.
His company, Shanghai-listed Great Microwave Technology,
disclosed that Mr Yu had been taken away by China's anti-corruption agency.
Mr Yu is in liuzhi, an extra-judicial form of detention in which increasing numbers of Chinese businessmen are being snared.
The country's entrepreneurs must contend with a lengthening list of worries.
Foremost is the economy, which has never fully recovered from the pandemic.
Consumer sentiment is tepid at best; overproduction and ruthless competition are rife.
Retail sales have shrivelled.
The number of lossmaking industrial firms has been hovering at a record high.
But a further set of concerns is growing in prominence.
As the economic outlook darkens, China's institutional shortcomings are making the business elite even more miserable.
Official investigations into company leaders are on the rise.
So are court rulings that limit their freedom to travel around the country.
A spate of suicides among bosses this year is widely seen as evidence of intensifying pressure.
Liuzhi detentions are perhaps the clearest source of unease.
When the system was created in 2018 it was aimed mainly at Communist Party members and government officials,
part of the anti-corruption crackdown begun by Xi Jinping, China's supreme leader, five years earlier.
It is now frequently directed at businesspeople too.