1. The Ming Dynasty was a period when popular literature such as novels and operas flourished and orthodox poetry declined relatively. The change of this power is not reflected in the reduction of the number of poems, but in the deterioration of the ideological and artistic quality of the works.

2. Paper currency customs is one of the customs that levied inland tariffs in Ming Dynasty. In the fourth year of Xuande (1429), because traders refused to use devalued Daming banknotes, the government allowed businessmen to pay business tax with Daming banknotes in the commercial center to dredge Daming banknotes and take the opportunity to increase taxes.