Singapore is its own country
Singapore’s capital is Singapore ( a city-state), China’s capital is Beijing.
China consists of ethnic Chinese, Singapore has 4 main racial group with the majority being ethnic Chinese.
China is perceived to be communist in nature, Singapore is a partially democrat.
China is huge. You cant miss her on the atlas. Singapore is tiny. If you do not put in effort,you won’t be able to find it.
China has thousand of years of history, and Singapore has 52 years of history.