If new evidence suggests that the previous guesses were wrong, it is a good thing that spies are willing to say so.
A: we have noticed President Obama's visit to Cuba. We believe that it is a good thing that the US and Cuba are normalizing bilateral relations, and we are happy to see its result.
I think it is a good thing that more and more Chinese people like to say "dream back to Tang Dynasty" and "dream back to Chang'an".
