Evergrande's billionaire chairman Hui Is under police surveillance

(Bloomberg) -- Hui Ka Yan, the billionaire chairman of beleaguered developer China Evergrande Group, has been suspected of committing crimes and placed under police control, in another blow to a real estate tycoon who was once among the richest men in Asia.

Authorities notified Evergrande that Hui has been subject to "mandatory measures," due to "suspicion…