Victor Mallet visa controversy
The incident caused a furious debate over the one country , two systems model which Deng Xiaoping promised for Hong Kong , and over restrictions to freedoms that were promised in the Sino-British Joint Declaration which included a "high degree of autonomy" , democratic reforms , and maintenance of the freedom of the press . 
<triplet> Sino-British Joint Declaration <subj> one country, two systems <obj> main subject