The Song dynasty was not anywhere near an industrial age. China never went through a machine revolution with great proliferation of the usage of machines as in things like windmills, water wheels, clocks, trip hammers, screw presses etc: https://erikexamines.substack.com/p/the-missing-chinese-mach...

China had machines, but they were used at a much smaller scale and had no way to expand in usage thanks to unsuitable geography and climate in China.