You are making a comment about a society you know nothing about. Singapore is not in China. It is a city-state as we call them. A city that is its own country. It is actually next to Malaysia, not even close to China. They also carry out hangings which is cheaper then anything. They do it almost immediately after the sentence is carried out (the appeals process takes less time).
You quite frankly don't know what you are talking about. Singapore does not have those rules. Again learn your geography. Additionally, Singapore has the death penalty for murder cases (including hit and run cases).