Hong Kong is located to the southeast of China along the South China Sea. It is a special commerce zone that operates autonomously from China. It is a major world hub for commerce, finance and internet transit.
If you want to reach the massive population in China, this is the place to do it from. China literally borders Hong Kong.
With Hong Kong being a major internet hub in Asia, you can be certain that connectivity from here should be good nearly anywhere in Asia. This includes the neighboring countries of Korea, Japan, Philippines, Indonesia, Singapore, Malaysia, Vietnam and Thailand.
IPv4 Test Address: 18.104.22.168
IPv6 Test Address: 2402:9e80:0:1000::1:918b