If a Fortune 500 company like Caterpillar got hoodwinked for $580 million, anything is possible with these Chicoms. Of course each situation is different.
I don't see SIAF being an outright scam from what I know. If there's any irregularities, maybe overstating of certain items on the financials. The CEO has no history of chicanery and he's been in the agri-business most of his life. IMO, he's carrying his life's work through SIAF. I often wrong, so don't listen to me.
As for singling out U.S.-listed Chicom scams, oh please! Give it a rest. The biggest scam in the stock market, IMO, is the U.S. OTC and pink sheet stocks. These companies regularly release LOI (letter of intent) and MOU (memorandum of understanding) and uninformed investors don't know any better and go berserk stampeding over each other for a piece of the action. With Chicoms, it's accounting fraud. With U.S. stocks, it's the promise of the "next big thing" that never gets fulfilled. Same result, different methods.