evidence: China agreed to govern Hong Kong under the principle of "one country, two systems", where the city would enjoy "a high degree of autonomy, except in foreign and defence affairs" for the next 50 years. [...] After 2047, mainland China is no longer obliged to grant Hong Kong the autonomy agreed on with Britain before the 1997 handover, leaving the city's fate unclear. [...] "As an inalienable part of China, we cannot afford to be a country that undermines the security of China," said Regina Ip, one of Hong Kong's most well-known pro-Beijing lawmakers.