Recently, the Hubei Provincial Economic and Credit Office issued the Announcement on the List of Cement Clinker Production Lines and Enterprises with Production Time Calculated by 330 Days and 270 Days, which shows that the annual production days of the 4500t/d new dry cement clinker production line (second line) of Huaxin Cement (Daye) Co., Ltd. are 330 days, and the annual production days of the second line of Huaxin Cement (Daye) Co., Ltd. It is also the only clinker line in Hubei Province whose annual production days are calculated according to 330 days.