Chinese authorities have detained 13 people over the collapse which claimed 74 lives recently.
Most of the workers killed where working on the interior concrete wall of a massive circular cooling tower, about 70 metres high when scaffolding fell.
In 2012, another incident occurred, involving the same firm. The incident involved seven Yineng builders in a cooling tower in Yunnan province who tumbled to their deaths after scaffolding collapsed.
Three years prior 2 workers died after a vehicle accidentally backed into a scaffolding support beam at a Yineng-built cooling tower in Guangdong province.