Datang Environment Industry Group Co Ltd, a unit of the State-owned China Datang Group, said it plans to list its shares in Hong Kong next month.

Given the country's push for clean air, the company said it believes the time is appropriate.

Shen Zhen, vice-general manager of Datang Environment, said it was looking at an initial public offering in Hong Kong last year, but the timing seemed bad since Hong Kong stocks were then entering a bear market.