Regional walls are the barriers between the five regions. They isolate each region and make cross-region travel costly for Gu Immortals.
Fang Yuan notes that the five regions have regional walls that isolate one another, so each region has its own independent events and they barely influence one another. ch. 667
Cutting a passage
Each of the five regions is covered with a membrane that forms the boundaries of heaven and earth and isolates the regions from each other. Feng Jiu Ge’s group cuts a passage through Central Continent’s saint regional wall into Northern Plains’ licorice regional wall; the walls heal as travellers cut, and higher cultivation makes the crossing harder. ch. 710
Crossing difficulty
There are regional walls between the five regions, and the higher one’s cultivation, the more difficult it is to cross these barriers. Fixed Immortal Travel can ignore the regional walls. ch. 673
Information path passage
Feng Jiu Ge breaks through the regional wall into Northern Plains and sends a letter Gu home. Fairy Bai Qing asks how he could cross the regional wall without using an information path Immortal Gu, and why Feng Jin Huang is anxious to reply when she cannot read that Immortal Gu alone. ch. 730
The five regional walls target Gu Immortals, not Immortal Gu, illustrated by Feng Jiu Ge’s information path Immortal Gu once crossing two regional walls, from Northern Plains to Central Continent, without obstruction. ch. 1043
Blue water membrane
Between the five regions, regional walls are like thin membrane which shields the region. Blue water regional wall is the protective membrane of Eastern Sea. Hei Lou Lan warns that Fang Yuan’s upper extreme heavenly eagle can roam the nine heavens and may travel in the five regional walls freely. Ying Wu Xie answers from Northern Plains records that Hei Fan’s upper extreme heavenly eagle was raised in Northern Plains, so if it enters the five regional walls it would face suppression as well. ch. 1153
Thickness comparison
Bu Zhen Zi says it is said that the heavenly wind qi wall is thicker than the five regional walls, and that seeing the heavenly wind qi wall himself makes the claim seem true. ch. 1239 Related barrier material sits on heavenly wind qi wall.
Cost by life form
Northern Plains is bounded by the licorice regional wall and Eastern Sea by the blue water regional wall. Regional walls press harder on stronger life forms, so a rank eight crossing is innumerable times as hard as a rank six one. ch. 928
Three walls in sequence
A later return into the Southern Border crosses licorice, blue water, and Southern Border’s miasma regional wall in sequence. ch. 1211
Inside a wall
Inside a wall, immortal killer moves are weakened and a traveller can be ambushed; Gu Immortals there display only about fifty to sixty percent of their strength. ch. 1216
Connections(16)
0 later connections are veiled.