Teresa Teng made Mandopop a true mainstay by crossing over to mainland China after Deng Xiaoping came to power and instituted the open door policy in 1978 that allowed cultural products from Hong Kong and Taiwan to enter China. Teng's song became popular there despite an early ban on her songs by the PRC government for being "Bourgeois Music". Her "soft, sweet, often whispery and restrained" singing style in romantic songs such as "The Moon Represents My Heart" (月亮代表我的心) made a strong impact in mainland China where revolutionary songs were previously prevalent. A common expression then was "By day, Deng Xiaoping rules China. But by night, Deng Lijun (Teresa Teng) rules". The ban on Teng was lifted in 1986 and songs from Hong Kong and Taiwan, called "gangtai" music, became more popular within mainland China.