There are many coal mines in Guanzhong, and part of the coal produced is used as coking coal for iron smelting, part is used as fertilizer, and part is used for heating.

It's still the same old coal stove, briquettes, honeycomb briquettes and so on. With these cheap coals, the people of Qin State really feel much more comfortable in winter.

Not only the Qin State, this kind of low-tech thing, coupled with its large-scale popularization, naturally the countries in the Kanto region also learned from it and quickly spread it in other countries.

"Coal is very useful. We in China have a large amount of coal reserves. We should have started the industrial revolution... It's all the barbarians' fault..."

Li Yunze shook his head and changed the topic back to "Coal can be used to drive these steam engines, and the calorific value conversion ratio is very high."

Ying Zheng looked at Li Yunze seriously, waiting for his next words.

"The Western Regions have already reached Khotan." Li Yunze changed the subject here and started talking about the Western Regions. "It's thousands of miles from Khotan to Xianyang City, so transportation is very difficult."

"exactly."

Ying Zheng immediately nodded and responded, "It takes dozens of days to ride a horse. If you go on foot, a trip will take at least a year."

"This steam engine can effectively solve this problem."
Chapter completed!