Now you have latched onto GDP per capita after starting from GDP...Macau has just 1 million population and Singapore 5 million, they are pretty much cities rather than province ,so it's way more realistic for the people therein to have higher gdp per capita(ppp),similar case with hongkong ,but if we compare hongkong city to tokyo(a more fair comparison than japan's per capita gdp) ,which has a larger population yet hk still has lower gdp per capita than Tokyo.
The economic strength will be only properly signified by a best attainable proportion relative between the population size and economic vitality.
You are clearly mad based on your prejudice, since I just pointed out the fact that Korea as well as Japan out performs china's Guangdong province,I wouldn't have compared nations like Korea & Japan to Guangdong if Guangdong was tiny like Macau. But with just 50 million population korea is clearly domineering above the mentioned province based on productivity, pound for pound.I'm not saying Guangdong is doing bad,but Korea deserves more credit for what it did with the limited population they had, instead of being maligned as the nation surpassed in GDP by a mere province of China.