Critics say the opera glorifies a man who was responsible for some of the greatest tragedies in modern Chinese history.
Police are still checking vehicles coming in and out of town, as the majority of businesses re-open.
Chan Pak-yeung is sent to prison for nine months for throwing water bottles at police and resisting arrest.
A pro-Beijing newspaper has published a tirade against the city's chief executive and the head of China's parliament in recent days.
Joshua Wong was met at the airport by police after being added to an immigration "blacklist," reportedly at Beijing's request.
Suffering the same fate as many detained rights lawyers, Lin Bin is incommunicado in spite of claims he was released from detention.
Commentators say the government is aiming for total control of all forms of media and public debate.
Education officials warn that the pursuit of independence for the city is unconstitutional, however.
Rights lawyers say the latest regulations governing their profession will further erode their ability to protect clients.