How high are the six old rooms in the mountain and coastal defense?

There is a limit to the height of the old six houses in Shanhaiphong. According to the relevant public information, the family can only upgrade to level 25 at most, and it is difficult to get the materials of level 20. It takes one week to upgrade to 18 and 19. The maximum range is 13x 13, which is the size of 10 home court. Upgrading from 10 level will not expand the scope of home.