Reading your explanation about Latvia’s height, I have a little question: there’re states that never gain their sovereignty yet has taller height, HK as one of them. Could you mind to explain on a little bit? (sorry if offenced)

You didn’t offend me at all, no worries. I said that Latvia’s short height was a result of multiple factors. His economy isn’t strong, he was repressed by Russia for a significant part of his life, and later, while being sovereign, he didn’t achieve full independence until the USSR’s dissolution. 

What distinguishes Hong Kong is that his economy is huge (being a low-tax trading port), hence the taller height.