1. Policy restrictions: China's energy policy and relevant laws and regulations have strict regulations and restrictions on the mining and operation of coal mines. If the enterprise's operation mode and mine design do not meet the policy requirements, it will be difficult to obtain the necessary approval and permission.

2. Complicated geological conditions: The geological conditions of Lu Xin Coal Mine in Inner Mongolia are complicated, and there are hidden dangers in the mine, so the mine construction needs more capital and technical input.