This is the thing that annoys me, many Americans approve their government doing industrial espionage to other countries, but then are morally outraged when others do it.
We're not at war, and I assume it's perfectly legal to copy information about labs or whatever, so long as you don't incidentally violate any contracts or laws.
Ultimately, there is no real morality when it comes to the actions of state actors beyond "will it improve my citizen's life?". This most certainly will, so for a Chinese official it seems moral to them.
Many people do believe it is a moral wrong to impose something on other people without their consent.
You could also make an argument that the other people are withholding something that could be used to do good for their own interests they lose the moral high ground.
In any case, there is really no moral argument to indict them, it's purely a question of interests in this case, so let's not pretend.