BEIJING - China will strengthen commodity price monitoring and continue to release copper, aluminium and zinc from its state reserves in batches, the National Development and Reform Commission (NDRC) said on Monday.

The state planner had sold 20,000 tonnes of copper, 50,000 tonnes of aluminium and 30,000 tonnes of zinc from its reserves on July 5. 

More than 200 nonferrous fabricators attended the bidding, with sales prices about 3-9% lower than market price that day, the NDRC said.

(Reporting by Min Zhang, Stella Qiu and Ryan Woo; Editing by Himani Sarkar) ((min.zhang@thomsonreuters.com; (8610) 5669-2105;))