From January to May, fines totalling 6.14 billion yuan (about USD 901 million) were slapped on law violators in the securities sector, according to the China Securities Regulatory Commission (CSRC).
A total of 29 people were suspended from securities business in the five months, the regulator said.
In 2016, the CSRC punished 183 illegal market activities and handed out fines of 4.28 billion yuan, up 288 per cent from the 2015 level. Some 38 people were barred from the securities industry.
The CSRC has been toughening supervision and punishment of illegal market activities such as insider trading and stock manipulation after the market rout in 2015 shattered investor confidence.
In March, the CSRC slapped a 3.47 billion yuan fine on a company chairman for stock market manipulation, a record high.