What do/did article 35 and article 125 of the 1982 PRC and 1936 USSR constitution actually do?

Chapter 2 article 35: Citizens of the People’s Republic of China shall enjoy freedom of speech, the press, assembly, association, procession and demonstration.

ARTICLE 125: In conformity with the interests of the toilers, and in order to strengthen the socialist system, the citizens of the U.S.S.R. are guaranteed by law: — (a) Freedom of speech; (b) Freedom of the Press ; (c) Freedom of assembly and of holding mass meetings; (d) Freedom of street processions and demonstrations.

I'm not going to sit here and be like "urmagod china ussr is a 1984 dictatorism" but I do just want to know what this actually means. For instance, both countries engaged in very obvious censorship and banning of materials. I'm not saying these actions were right or wrong, but just (at least on the face of it) contradictory to the previously stated articles. Presumably there have been court cases in both of these countries that actually helps outline what they mean.

This isn't to say Bourgeois countries follow freedom of speech either (I will leave proving this as an exercise to the reader. And by exercise I mean a slow walk to the other side of the room), but I think my main question is why include them so broadly, or at all really, if they [at least from what I remember] haven't really been enforced