In the past forty years of reform and opening up

our country has experienced rapid economic and social development

and the great transformation has brought about various expressions of various demands. How much individuals prefer to choose more institutionalized ways to express their demands when encountering injustice could reflect the level of government credibility and social governance ability. Thus

researches on expression of demands should focus on how to realize the institutionalization of the expression of demands. Using the data from "2017 Urbanization and New Migration Survey"

this study aims to characterize the logic of individuals' choice of form for expression of demands when they encounter injustice. Analysis shows that: Firstly

due to the multi-dimensional dual structure

there are structural differences in the possibility for individuals to encounter injustice. Secondly

social structure factors

such as income

household registration

migration status

and city of residence are associated with individuals' choice. Thirdly

higher perception of inter-group conflicts and social problems are associated with higher possibility to express demands

especially through non-institutionalized channels. Fourthly

positive evaluation of government effectiveness is associated with higher possibility of institutionalized expression of demands. In conclusion

the background of social transformation should be taken into consideration when trying to improve and perfect the demand expression mechanism in our country. Moreover

eliminating the multi-dimensional dual structure

solving social problems with initiative

improving the demand expression ability of individuals and enhancing the response ability of the government could be effective means to change the form of expression of demands from non-institutionalized ways to institutionalized ways.