Is it okay to leave the door open in the hall where the shrine is installed?

It is possible. Usually there is no incense offering, it is possible to close the door, so as not to fall too much dust. Shrine is a representative of traditional Chinese culture, a decorative wooden buildings, is used to protect the hidden Buddha, Buddhist scriptures or Taoist ritual objects of the small indoor special space, is a very important symbol of Chinese religious culture, but also an important part of ancient Chinese civilization.