Wrinkles are widely observed, from the landforms of the earth crust, to human skin, and to flexible electronics. A stiff-soft bilayer wrinkles at a tiny compressive strain, which is almost inevitable in real world applications. Flexible transparent electrodes, a key element in flexible electronics, often consist of stiff-soft bilayers, which tend to wrinkle under mechanical loads. Surfaces wrinkles dramatically increase roughness and reduce optical transmittance, and may also deteriorate interfacial strength. Wrinkles have become a plague to flexible transparent electrodes and related devices.