Remember that line of reasoning to the conclusion that a technologically advanced race must have solved its social problems? The Maoist version of that, expressed by Wang Li's superior, General Chou Yuan, is:
"'Some believe that the Sigman will inevitably put itself at the disposal of the people's sacred cause, when communication has become good enough for it to realize what conditions are like on Earth.'" (p. 45)
Put itself at the disposal! Of the Chinese government? We really do not know what will happen. My hope would be that a wiser and more technologically advanced alien would introduce, gradually, technological innovations that would ease the most pressing problems on Earth, thus starting to address the most immediate causes of conflict. Beyond that, it would be up to us - "the people" - how we responded to any help offered by an alien.