Why is the development of ancient natural science and humanities in China uncoordinated?

Your question is closer to the famous Needham puzzle. Different people have different views on this, and they can also put forward various opinions from different angles.

I think that in terms of economic development, China's economy from ancient times to modern times has been dominated by agriculture and has been self-sufficient, so it lacks the motivation to develop industry and natural sciences. The change of crop yield and weather can not be predicted accurately, which makes the ancients more inclined to qualitative analysis than quantitative analysis, which also affects the emergence of scientific theories. Agricultural production is affected by seasons, and there is a long leisure time every year, which provides conditions for the development of culture.