đồng a year in profit, with some even suffering losses. Compared to 2010, the profits of coal companies were almost unchanged. Mông Dương Coal (MDC) had a profit of VNĐ79 billion in 2010 – the highest in the group mentioned above. But by the end of 2020, this enterprise only reported VNĐ27.8 billion in profit. Cọc Sáu Coal (TC6) witnessed profit fall from VNĐ67 billion in 2010 to only VNĐ5.6 billion in 2020, the lowest level among the group, although its yearly average revenue is much higher than many other businesses in the industry. The merger between Cao Sơn Coal (TCS) and Tây Nam Đá Mài Coal (TND) also did not help Cao Sơn Coal improve its profit in 2020, hovering at more than VNĐ54 billion.