Zhengzhou Baiwen Group, a debt-ridden retailer, said Friday it has applied to the Shanghai Stock Exchange to suspend trading of its shares starting Monday. Zhengzhou Baiwen's shares have hit their five per cent downside limit in the past seven sessions. They are down five per cent again early Friday, at 5.77 yuan ($1=CNY8.28), as investors react negatively to controversy surrounding the company's planned bailout.