The affairs of a country should be handled by its own people, no country should be allowed to interfere in the internal affairs of any other sovereign state on whatever excuses.

各国的事情应由各国人民自己去处理，任何国家无权以任何借口干涉其它主权国家的内部事务。

youdao

A: Changes in leadership are internal affairs of one country.

答：领导人更迭是一国内政。

youdao

But all were in reality acts of interference in the internal affairs of a sovereign country, though in each case some argument, good or bad, was offered to justify the action.

ECONOMIST: Sometimes it is a risk that must be taken