Chinese company will let a takeover bid by its unit for the miner lapse after the country’s foreign investment board sought extra time to consider the deal.

New guidance represents a 20% decrease from previous forecast.

The miner had returned to 85% of capacity by mid-June.

The government has announced lockdowns for the mines-heavy Antofagasta Region to begin on Tuesday.

Pandemic could drive more families to put their children to work in mines, officials said.

Company was looking to sell mine after repeated attacks by militia.