Area division, merge function does not work properly?

(1) Area merging conditions:
Only two adjacent clearable areas are supported to be merged in one operation;
(2) Region splitting condition:
(1) One operation supports splitting only one clearable region;
(2) The split line and the area profile can only have 2 intersections;
(3) The segmentation line cannot pass through the position where the door is located in the house type;
④ The area of the divided area is not less than 1 square meter;
⑤ Two partition lines of the same area cannot cross (i.e. the same area that has been partitioned cannot be partitioned again);