I saw this in Lisbon Airport the other week, while travelling back to New Zealand:
I can't imagine a similar sign in the arrivals area at Auckland Airport going down too well. But I guess when your real estate market has gone through this:
... any source of increased demand for housing, which is going to push house prices back up, is a good thing. This is especially important when you have combined government, corporate, and household debt that is about 360% of GDP.
Are Chinese buyers affecting the Portugese market? It's hard to say, but Property Wire reports prices increasing for the first time since at least 2010, so maybe they are. Although, Property Wire put the increase down to economic recovery and increased confidence, rather than any effect of foreign buyers.