I'm raising chineses right now and they hatched around the end of febuary. I would say they could hatch sooner than 10 days. It really depends on how ur keeping them. I seperated some into cups, so the high humidity and the warm temps helped. If you feed them as much as they'll eat they molt super quick. Mine are at L6 and i don't think they've ever taken more than 14 days between molts. They're a really fast growing species.