National coal group posts $2.24 billion in revenue in four months stockbot 0 14 05.06 17:36 https://vietnamnews.vn/economy/1655062/national-coal-group-posts-2-24-… + 0 https://vietnamnews.vn/rss/economy.rss + 0 During the period, the corporation mined 13.72 million tonnes of coal, up 2 per cent from the same time last year, and generated 3.42 billion kWh of electricity, or 6 per cent higher than its set plan.