PetroChina will go public on Shanghai's A-share market next month, said PetroChina Chairman Jiang Jiemin yesterday.

Jiang said the company was waiting for "the right time" to tap capital in the domestic market after China's security watchdog approved the Shanghai initial public offering (IPO) of the nation's largest oil producer.

"The procedure has been finalized and we are now waiting for a window of opportunity," said Jiang. PetroChina has already been listed on the Hong Kong capital market.