hong kong/beijing china say thursday right bar people hong kong day british activist deny entry former british colony complain britain demand explanation hong kong return chinese rule 1997 one country two systems formula promise high degree autonomy freedoms enjoy mainland critics accuse government bend communist party leaders beijing gradual water territory freedoms include freedom speech right protest british foreign secretary boris johnson say concern benedict rogers co-founder conservative party human right commission deny entry hong kong wednesday demand urgent explanation hong kong china come week sensitive communist party leadership meet start beijing johnson also say hong kong high degree autonomy right freedoms central way life rogers vocal critic china-ruled hong kong treatment political activists include jail student leader joshua wong believe decision bar make chinese officials chinese embassy london warn early british member parliament allow chinese foreign ministry spokeswoman hua chunying say central government responsibility foreign matter relate hong kong central chinese government special administrative region government handle relevant issue accordance law hua say allow allow people china sovereignty ... hong kong affairs purely internal matter china say china lodge solemn representation britain mean official complaint ask incident radio talk show hong kong leader carrie lam agree ultimately basic law hong kong mini-constitution central government responsible foreign affairs lam say ask immigration control fell hong kong jurisdiction lam say consider whether foreign affairs involve process immigration say everything fall hong kong high degree autonomy basic law say rogers speak reuters shortly arrive london say beijing statement confirm assumption decision boot make hong kong chinese authorities describe interference hong kong immigration control alarm serious threat one country two systems china reveal hand world ought wake long time ago think really ought wake mean one country two systems say sad mean hong kong former head hong kong civil service turn pro-democracy activist anson chan say case serious breach basic law article 154 basic law say hong kong may apply immigration control entry foreigners hong kong immigration department must seek instructions high tell reuters beijing send message dare speak hong kong ... allow amnesty international east asia director nicholas bequelin suggest china definition constitute national security creep hong kong china critical political system commit national security crime exactly type thing one country two systems protect response reuters request comment whether china involve rogers denial entry hong kong immigration department say comment individual case china admit ask group british mps cancel visit hong kong 2014 massive pro-democracy protest joshua wong leader paralyze highways 79 days hong kong occasion bar entry individuals include dissidents former leaders 1989 tiananmen square protest beijing danish sculptor jens galschiot make tiananmen sculpture china say right bar people hong kong british activist expel