Central bankers' tasks are limited to keeping inflation stable and independence easier to maintain. Given this narrow mandate, the allocation of central bank decisions is limited. Moreover, it is easier to explain how the central bank's policy tools are linked to its political mandate. The taboo of to not eat eggs with soya-bean milk is regarded as the popular about soya-bean milk. There are two reasons for the statement: you are the trypsin in soya-bean milk can inhibit protein digestion, to cut back nutrition value"; second is the eggs in the sticky protein and trypsin in soymilk is combined, to make material stop digested, and help reduce nutrition value ". Planning is so important for the success of the transaction that it is necessary to use a hypothetical example to further illustrate.