Yunnan Copper Industry, the mainland's third-largest producer of the metal, plans to raise as much as 2.9 billion yuan in a bond sale to repay loans and for use as general working capital.
The Kunming-based company will seek shareholders' approval for the sale on October 29, according to a statement filed with the Shenzhen Stock Exchange.
The bonds would have a maturity of between five and 10 years and the date of sale would depend on market conditions, the statement said.
Yunnan Copper shares fell 2.5 per cent to close at 89.90 yuan yesterday.
Yunnan Copper and other listed mainland firms have been tapping the recently reformed corporate bond market for funds after banks were asked by the authorities to tighten lending.
In a major market overhaul, the China Securities Regulatory Commission took over some regulatory power from the National Development Reform Commission and scrapped stringent rules such as quotas and bank guarantees