China's divide-and-rule tactics

From the Economist, regard Hong Kong:

Joseph Cheng, an academic and pro-democracy activist, says the democrats still need “a small miracle” to gain a majority. Even if they do, he adds, they should not underestimate the effectiveness of China's divide-and-rule tactics. One of the most prominent democrats, Szeto Wah, has publicly accused a well-known trade unionist, Lau Chin Shek, of being like “Judas” after Mr Lau made conciliatory remarks about China. Mr Cheng admits that the democrats are probably not well enough organised to cope with China's unexpected overtures.

They do that with their labor organizers, too.