I will be be travelling to Shaoxing county industrial zone from Ha'ian County, Nantong.

First of all, I'd tell you that there is more than one industrial zone in Shaoxing, so you need to cofirm it further. Anyway, I can tell you the direction from Hai'an county to Shaoxing:
take a bus or train from Hai'an to Nantong first. Then go to Nantong East Bus Station to take a direct bus to Shaoxing, for which two buses are scheduled at 08:00 and 14:50. Bus or train from Hai'an to Nantong takes around an hour and the duration to Shaoxing is around 4 hours.