Why can only two rooms be merged in the radiation shelter?

The radiation cabin room can be composed of three rooms at most, and then we can combine three small rooms into a big room, where the room value, upgrade cost and upgrade will be three times that of the small room. Now Bian Xiao will introduce how to combine it. In the three-in-one combination, we can combine 1 room at most, so as long as they are built next to the same column, they can be merged automatically.

For example, elevators -A-B can be merged automatically as long as a B is built next to B > elevator -A-BB. If this is the case: elevator -B-A, to build an "elevator -BB-A", one can only be dismantled first, or elevator -B-A-BBB.

In addition, pay attention to the automatic merger of buildings at the same level. Here Xiang Xiao reminds players that the more similar rooms, the higher the construction price. If the space occupied by stones needs money to clean up the bride price and build a room, the room type will be unlocked with the increase of the number of people in the shelter, then do you understand? When merging rooms, players should remember that only rooms of the same type can be merged, that is, rooms with the same attributes, such as restaurants, can be merged into a big house.