Where is the proof of economic dependence of immigrants issued?

Issued by neighborhood committees or communities. The applicant's age should meet the requirements that the principal applicant 18 years old and the applicant's spouse has no age limit. Parents of both the applicant and the spouse, parents over 65 years of age can apply directly, and those under 65 years of age need to show their certificates of financial dependence on the main applicant (proof of living together issued by the neighborhood Committee or community, bank proof that the main applicant pays the parents' living expenses regularly, the more the better). Children under 18 can apply directly. Children above 18 need to be unmarried, studying and financially dependent.