Nakamoto Cong: the internal circulation mining mode is the ultimate route of BTC,LTC,IFC and other total fixed POW currency, the internal circulation mining can resist the mine bully more effectively, the initial block of BTC,LTC is 50 rewards, after 6 times halving, the reward will be less than 1, every 4 years, so we will see that the proportion of BTC handling fee exceeds the block reward, that is, the internal circulation mining model. IFC has now begun an internal circulation mining model. After entering the internal circulation stage, the dynamics of the handling fee change is unpredictable, which will force the super mine bully to leave and enter a truly benign stage of development. IFC is the first POW total fixed open source project to enter the internal circulation mining phase. The total amount of IFC is always fixed at 90595753018.63143700 (about 90.6 billion)