Lingbao Gold (HKG:3330) expects a net profit of between 656.4 million yuan and 687.0 million yuan for the six months ended June 30, up 330% to 350% from 152.7 million a year prior, a Thursday Hong Kong bourse filing said.

The gold mining and processing company cited a significant rise in gold production, improved operating efficiency, and lower costs as reasons for the anticipated boost in profit.