Feng Shui, should the whole house be closed for training at night?

Feng shui is also constantly improving and innovating! Zhouyi, from the earliest and most popular eight single hexagrams, has developed to sixty-four hexagrams, three hundred and eighty-four hexagrams, classics, biographies and ten wings. Therefore, although the residence should "hide the wind and gather gas", one of the necessary conditions for survival: oxygen should be as fresh as possible to be the most beneficial to mankind! If you only concentrate on "hiding wind and gathering gas" during sleep and close the door all night, the concentration of carbon dioxide is too high, which is harmful to your health! Doors and windows should be properly opened to allow air convection!