China says whatever happens to economy in short-term, long-term trends remain good

Of course he is going to say that, does he actually have a "choice" to say otherwise. :0)

Do we have the evidence to disagree?

His "good" may be different from what economists forecast. Even if growth slow to 3% or below, to him it still consider "good" so long as China is still moving very slowly despite US full tariff.

He doesn't dare to say something different.