Doesn't the capital have to be located in Macau? Also, how did you pull it off? I kinda wanna try myself.
Yes, but my capital is Macau - here's a closer in shot from earlier. As to how I did it, here's a brief outline - but it didn't work for me so....
1. Form United Kingdom of Brazil and Portugal. Early 1938
Got the third research slot first then reformed the army to get manpower then b-lined the Empire of Brazil focus. This creates a civil war, but it's easy to win using naval invasions.
2. Invade Spain as soon as the civil war ends. Late 1938
Use the Remember Olivenca then with the fascist threat focus to get a wargoal on them, so you can take them the minute the civil war ends once all their units are gone.
3. Form collaboration govt in Macau
You should get the message at some point in 1939 (or the option in the list).
3. Attack China - 1st time. Early 1940 start - finish mid 1941.
Done by justifying on the Guanxi Clique once world tension is high enough. Build up port in Macau and naval invade from Portuguese Timor as well. Peace conference will suck because you won't be able to take that much, and you can only take thing in your puppet's name (more expensive). I got the Guanxi Clique territory.
4. Attach China - 2nd time. Early 1943 - finish 1946 (argh)
Attacked China/Japan and all its puppet in 1943. Logistics headache, but relatively easy. Then Japan naval invaded me all over the place again and again and again, until I'd destroyed 6mm troops. Naval supremacy to get to Taiwan was what took for ever (massive number of TAC bombers to sink their fleet in the end is what I needed). Also had to take Japan because the Raj sneakily took Yarkand in North West china. Peace conference was a doddle.
BUT THAT DIDN'T TRIGGER the event. Hmm...
I guess it's because Hongkong is still british...
Unfortunately not. I've heard it's not needed, but I tried continuing, and declared war with the brits to take HKG, but it didn't work.
EDIT: seems it is, but I need to do it in a peace deal so back to the drawing board. Thanks.