How to solve the problem of opening the door to look at the kitchen

Cut to the chase, and the money will run out. It means that the furnace mouth and the gate are in a straight line, so there will be a penalty.

Solution:

(1) Set an opaque screen between the gate and the kitchen.

(2) Put a pair of "glory elephants" in the gate with their heads facing outward to absorb the leaked air.

(3) You can put a string of five emperors' money, six emperors' money and ten emperors' money on the mat inside the gate.