According to Wendy Su, what are the three main phases in the history of Chinese martial arts cinema in the 20^th century? What is the new hybrid martial arts cinema of the 21^st century and how does it "close the circle" on the martial arts films of the previous century? Drawing on specific films discussed in the readings/lecture, explain how themes of Confucianism, nationalism and patriotism are represented in the new martial arts cinema of the 21^st century?