Is there an overt contradiction between 'Opium-smoking continued openly in Hong Kong until 1946; in mainland China the Communist government abolished it when they came to power in 1949.' and 'Opium was smoked in Hong Kong until 1946 and banned in 1949.'
Opium-smoking continued openly in Hong Kong until 1946; in mainland China the Communist government abolished it when they came to power in 1949.###Opium was smoked in Hong Kong until 1946 and banned in 1949.