WORLD
The Echoscape is not a dream
It is not a hallucination either. It is the infant's senses, happening now, mapped inside the father's mind. The baby has no language and no concepts. For him the world is vibration, light and dark, heat and cold, hard and soft. Lu Yi's brain will turn that raw-sense into a story he can walk—thirty years of memory, metaphor, and judgment folded in.
The real side
These worlds are not a fantasy map drawn from nowhere. See the apartment, the kitchen, the supermarket first. That is where the mazes grow from.

Apartment
Tungsten, cloth, exhaustion. The Echoscape grows from this table.

Kitchen
Steam from formula → Steamrealm · Valve Works

Supermarket
The height of the shelves → Highfield · Canmaze
Transense
Transense is unavoidable. It keeps the father from coming apart in a nameless feeling, and it puts him further from the child. Decoding looks like a win: do a thing in the Echoscape, and the baby quietens. That correspondence feeds the need to control. Then decode-lock arrives. Some crying will not become a story.
Return-to-sense is the reverse: put the dictionary down. Go back to feeling. It is not becoming dull. It is refusing to cover another soul with your own mind.

Terms
ECHOSCAPEOfficial English title · for 映界
映界
Echoscape
The infant's sensory map. Not a dream. Not a hallucination.
映象
Echoform
What gets rendered inside it.
转译
Transense
Turning raw-sense into a story a father can walk.
素感
Raw-sense
Feeling before language reaches it.
感律
Senselaw
Physics written by the infant's mood.
译解
Decoding
One successful transense; the baby eases on the real side.
译锁
Decode-lock
When raw-sense will not become narrative, cognition seizes.
归感
Return-to-sense
Drop the translation. Go back to feeling.
The official English title is ECHOSCAPE. The Chinese title remains 《异象行者》. Echoscape is the word inside the story for this sensory map; it shares a root with the English title.

River jade
The medium is not a pendant and not a prop from a magic ad. It is a stone a river has worn: skin-smooth outside, still coarse within. A physical anchor for a father and son. Its temperature follows the baby. It comes as an unmarked parcel, and a line that sounds like a will and like a warning.
After return-to-sense, the jade is gone. Not stolen. No longer needed.

Meteoric iron
Another unmarked parcel at the end of the season. Black, heavy, cold. The same six words. Jade is protection. Iron may be a ward, or a forging. That season's rules are unwritten, marked for confirmation.
Senselaw
Physics in the Echoscape is not a lore table. The infant's mood writes the law. Do not invent a religion around it, and do not turn it into a skill tree.
Calm
Gravity holds. Light is soft.
Pleasure
Gravity thins. The body can leap.
Unease
A viscous rain. Movement drags.
Crying
The world shakes. The sky splits.