Nowadays, both rural and urban areas have a large number of old houses with exterior wall tiles and coatings peeling off, posing significant safety risks and, in severe cases, water seepage issues that trouble many homeowners. The Zeshang Lianhuanjia dry-hanging renovation technique can now be applied directly to old walls, whether they are tiled, painted, or made of red brick. This method eliminates the need for exterior wall removal and base layer treatment. With a bottom-up interlocking installation system and matching finishing systems, it effectively resolves exterior wall water seepage problems. The construction is fast, generates no waste, and causes no environmental pollution.