Who do you think is the highest god in the myth system of China? Why?

I think it should be Nu Wa. Nu Wa created the world, not Pangu. The myth of Pangu's creation originated in the Han Dynasty and was first seen in Wu's "May 35 Calendar" during the Three Kingdoms period. Before that, there was no myth and legend of Pangu's creation, only the legend of Nu Wa's creation. In ancient mythology, Nu Wa transformed everything and created 70 pieces every day. However, the society gradually transited from the matriarchal society to the paternal society, and the status of Nu Wa gradually declined, and the contribution of creation was transferred to Pangu, who represented the paternal society, leaving only the merit of mending the sky and creating man.