What are the problems reflected by the meeting between the Chinese student and American professor in the movie Dark Matter?

A、The professor didn't stand up to meet the student and crossed his legs on the table. This reflects his greater power and higher social status.;
B、The Chinese student stood up when he answered questions, and bowed back to the door when he was about to leave. This shows that he has a lower social status than the professor.;
C、The power distance of the two cultures are different. China has a higher power distance while the United States has a lower power distance.;
D、The professor spoke fast and some words were pronounced vaguely. If the professor did not neglect the student on purpose, the lack of cultural sensitivity can be seen.