A total of 641.86 tonnes of copper rods changed hands on the first day of trade, with a turnover of 29.94 million yuan ($4.23 million) and five domestic market participants, the Shenzhen-based QME said in a statement on its website.

HKEx, which also owns the London Metal Exchange, wants the QME, located just 50 kms (30 miles) from Hong Kong, to give it much coveted access to the world's largest copper market, and is also in talks with the authorities in the southern Guangdong province about LME warehousing in mainland China.

"In the future, the QME copper rod price will gradually cover the main copper rod consumption areas" the statement said, adding the exchange would work hard to make it become an important national indicator for spot trade.

The copper rod launch marks the second time the QME has rolled out products ahead of guidance. Trading in aluminium ingots and billets began in late June, after HKEx Chief Executive Charles Li said in May he planned to launch those in the third quarter. He also said at that time copper trading on the QME would begin "probably next year".

The QME opened in October 2018 with trading in alumina, the substance used to make aluminium. Its trading hours are from 0900-1530 (0100-0730 GMT), Monday to Friday.

(Reporting by Tom Daly, Editing by Sherry Jacob-Phillips and Emelia Sithole-Matarise)

By Tom Daly