The newly bought commercial house in June 20 17 has two entrance doors. Is it stipulated by the fire department?

Your understanding is correct. If the door goes straight to the front room, the door should be set as a Class B fire door; If the door is not directly connected to the front room, the door can be set as an ordinary door. Again, I need to remind you that if there are no two stairs in your building, the stairwell should be set as scissors staircase, and a positive pressure air supply system should be set separately to meet the requirements of the code.