An opening is a long slit

A thirty-meter-long white windowless exterior wall, pierced only by a horizontal glass slit approximately sixty centimeters high. The slit's ends turn directly around the corner and continue to the side. The glass is flush with the white wall, with no sills, frames, or sunshades. The entire wall appears as a material precisely cut to emit a line of light. Avoid: creating multiple windows of varying sizes on the wall, using typical square window openings, recessing the glass to form a sill, adding a sunshade or rain canopy above the glass slit.

Translated from Chinese by AI.

一面長三十公尺的白色無窗外牆,只被一條高約六十公分的水平玻璃縫貫穿,縫的兩端直接轉過轉角繼續延伸到側面。玻璃與白牆齊平,沒有窗台、窗框或遮陽板。整面牆看起來像一塊被精準切出一道光的材料。避免:在牆上開出多個大小不一的窗戶、使用一般的方形窗洞、讓玻璃內縮形成窗台、在玻璃縫上方加遮陽板或雨遮。