It is usually set for ancient palaces or public facilities. If ordinary people set up a circular arch, they will have unreasonable pressure (the gas field can't stop), and often feel breathless, unlucky and difficult to move forward.
How to solve the problem that the gate is a circular arch;
(1) The best solution is to flatten the circular part. ?
(2) If the land cannot be leveled, you can hang a string of "five emperors' money" at both ends of the gate to resolve it. Six emperors' money, ten emperors' money will do.