Where are the most charcoal factories in Guangxi?

Nanning, Guangxi. Kirin Charcoal Factory, Limugen Charcoal Factory, Nanning Hengwang Charcoal Factory and Machined Charcoal Factory are all charcoal factories in Nanning, Guangxi, showing that there are many charcoal factories there. Nanning, referred to as "Tancheng", also known as Greentown and Tancheng, is a prefecture-level city, provincial capital and I-type big city under the jurisdiction of Guangxi Zhuang Autonomous Region.