In addition to the direct exercise of the central government's right to govern the Special Administrative Region, it also needs the loyalty of the public authorities of the Special Administrative Region. It requires the public officials of the Special Administrative Region to perform their duties faithfully and actively perform their loyalty obligations. Otherwise, it will be difficult to fully implement the right of central governance in the Special Administrative Region. This chapter takes the sworn oath of members of the Hong Kong Legislative Council in 2016 as an example to clarify how to fulfill the duty of loyalty of public officials from the perspective of system analysis and improvement. <<