Gǎi / gé / kāi / fàng / hòu / zhè / ge / dì / qū / de / jīng / jì / miàn / mào / fā / shēng / le / pī / biàn

改革开放后，这个地区的经济面貌发生了丕变。

After reform and opening up, the economic landscape of this region changed radically.