In the daily governance of Hong Kong, China has proven itself as a competent overseer. Hong Kong's "Basic Law", a kind of mini-constitution imposed not by referendum, keeps the SAR autonomous. Hong Kongers have only two reasons for complaint, having not chosen the Basic Law for themselves and the gentrification of Chinese money re-defining native Hong Kongers as a new lower class living among some of the most expensive real estate in the world.
Crud hit the fan, however, when Beijing decided to "vet" Hong Kong politicians in advance. The Basic Law makes no direct provision for advanced-vetting, a statutory or policy decision heavily subject to interpretation. Youth are often quick to complain. In the minds of Hong Kong youth, Beijing's advanced-vetting policy is a violation of the Basic Law. Accordingly, Hong Kong youth have no interest in learning about the Basic Law from Beijing.
Now, Beijing has planned a Hong Kong -wide broadcast from a Mainlander—a Chinese speaking from Beijing's view—to educate Hong Kong students about the Basic Law. Schools are under no obligation to participate in Beijing's offer, so the public is led to understand. But, when your higher authority vets your politicians without a word-for-word clause to justify it, then invites your school to optionally learn how to follow the law, it is difficult not to feel some kind of pressure to "volunteer".
The best thing for China to earn good will is to rescind the advanced-vetting policy in favor of Hong Kong's local interpretation of the Basic Law and to allow only three schools to listen to the Basic Law address, applying with good reason. That's "basic law" of supply-and-demand economics. But, those ideas may be difficult for the Communist regime to quickly grasp.
So, it looks like China's path ahead will see plenty of conflict and strife. The student objections to the Basic Law seminar will by no means be the last, nor will it be Beijing's last attempt to educate Hong Kong's population.
The US has its own approach to PR. Notice how Korea made fewer Western headlines this week, though the situation is far from finished. Trump's planned visit, purportedly to include the Korean DMZ, is certainly a bold move to demonstrate courage from a leader and to eclipse North soldiers' respect for Kim Jong Un who wouldn't dare to get close. Don't be surprised if Trump walks right up to the border and speaks through a megaphone and says, "Where is Kim Jong Un? He can talk to me. Your leader is a coward. Don't trust him." Don't be surprised. Such a move befits Trump and would begin a cascade of implosion from within the Kim Dynastic ranks.