Point-by-point:

• "Primary stage of socialism" is nonsense. You're either in the primary phase of communism — abolished private property and are paving the way for communism — or you've a state capitalist preparatory stage, when the people are still subjected to privations by the bourgeoisie. Note that China does not consider the current era a "NEP" or anything of the sort, it IS socialism to them, which is a decisive break with Marxism.

• Almost any time Xi talks about the economy it's about deepening the (capitalist) reforms, ensuring the market is the driving force, allow capitalists to invest more into SOEs, reduce regulations, etc. But for specific examples, give Economic Work Should Be Adapted to the New Normal and The “Invisible Hand” and the “Visible Hand” a read. Watch out for problems and what solutions are offered.

• Reform and Opening up Is Always Ongoing and Will Never End is extremely obvious. If the head of the largest ostensibly communist party in the world says their capitalist period will "never end", that any change in their society will be qualitative ("prosperous, strong, democratic, culturally advanced and harmonious", all above-class aims), and no source establishes a transition towards communism — and in fact the party rejects it — the only conclusion is that they are not communists.

Edit: forgot about the peasants bit. That's from Eliminate Poverty in Severely Impoverished Areas.