Ning also said the company is working on plans to list crop and seed company Syngenta on the Shanghai stock exchange.
The Financial Times reported last week that China is planning to abandon a planned merger of the two state groups due to challenges in bringing the two management teams together.
"I don't know where the information came from ... It is fake. The two companies are very big and there are a lot of financial and legal issues. We are still researching the best way to proceed," Ning told reporters on the sidelines of China International Import Expo in Shanghai.
Talks between top management of the two groups about the government-orchestrated merger were first reported three years ago.
(Reporting by David Stanway; editing by David Evans)
