To change the outward appearance or form while keeping the essence or substance the same; to rebrand or repackage something without altering its core.
这家老牌甜品店虽然经过了盖头换面的装修，但其经典甜点的配方和口味依然保持不变。
Although this old dessert shop underwent a complete facade change, the recipe and taste of its classic desserts remain unaltered.
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