1. Different modes of supply: Xie Chang coal is supplied by signing a long-term contract, and the supply and price are determined by both parties within a certain period of time and implemented according to the contract. Ensuring coal supply refers to ensuring the stability and reliability of coal supply through the intervention of the government or relevant institutions, and often using government-guided prices or government reserve coal to ensure supply.

2. Different price forms: The price of coal in Xie Chang is often determined according to market conditions and negotiation between the two parties, and the price is relatively flexible. The price of ensuring coal supply is often set by the government or relevant institutions, and the price form is relatively fixed.

3. Different cooperation periods: The cooperation period of Xie Chang Coal is long, usually several years or even longer, and the supply and demand sides maintain long-term cooperative relations within the contract period. The cooperation period of coal supply is relatively short, and it is often a temporary supply in a specific period or under special phenomena.