Jed-when modifying nouns, you can directly use the answer of the Great Wall. However, in the second case, for example, it can also be said that Anfang jedes Jahres. (If there is an adjective before a noun, its suffix changes the same as after the definite article, but there is no plural. )

Jed- and when it is directly used as a noun pronoun (used alone, without modifying nouns), the change at this time is actually the same as the first case, but generally there will be no second case.