Hass By Luckycure Period: 400 to Feb 21, 2020 Water mill and windmill Period: Feb 7, 618 to Feb 21, 2020 Paper money Period: Jul 5, 723 to Feb 21, 2020 Mechanical clock Period: Jul 22, 1300 to Feb 21, 2020 Military sophistication Period: Apr 21, 1440 to Feb 21, 2020 Printing press