What were the doubts before Steyr's financial fraud was discovered?

Before Steyr's financial fraud was discovered, there were great doubts about the production, sales and inventory of Steyr's main products. Steyr Power Co., Ltd. received the advance notice of administrative punishment and market ban issued by CSRC. Suspected illegal facts include 20 14, 20 15, and 20 16 financial fraud, which is improperly disclosed by the actual controller, or will become the first company to be forced to withdraw from the market in that year.