Ginny Weasley and Cho Chang are not places, so I'm guessing your asking who are Ginny and Cho. Ginny Weasley is Ron Weasley's younger sister. She is the youngest Weasley and the only girl. In the epilog of the last book/movie, she marries Harry Potter. Cho Chang first appears in the fourth movie, Harry Potter and the Goblet of Fire. She is Harry's first love interest, but is dating Cedric Diggory through out the movie/book. When Cedric is killed at the end of the fourth movie/book, Harry briefly dates her. After the fifth book/movie, she is no longer an important part of the series.
Cho Chang and Ginny Weasley.
Ginny Weasley - Bonnie Wright. Ron Weasley - Rupert Grint. Cho Chang - Katie Leung. Draco Malfoy - Tom Felton. Hermione Granger - Emma Watson.
Cho Chang (mainly in book 5), and Ginny Weasley (books 6 and 7).
Harry is first in love with Cho Chang (books 4 and 5), later with Ginny Weasley.
No reason. Love doesn't have reason. It could be that Ginny Weasley has a much better sense of humor than either Cho Chang or Hermione Granger that she is a better fit for Harry. Both of the other female characters are more stoic and serious and Harry needs someone he can have a laugh with.
Ginny Weasley.
Ginny Weasley and in their fifth year Cho Chang.
Cho Chang and Ginny Weasley.
Ginny Weasley, Cho Chang (only once did they kiss)
Ginny Weasley - Bonnie Wright. Ron Weasley - Rupert Grint. Cho Chang - Katie Leung. Draco Malfoy - Tom Felton. Hermione Granger - Emma Watson.
Ginny Weasley. Cho Chang and Romilda Vane used to like him.
Cho Chang, Ginny Weasley and Hermione Granger.
Ginny Weasley and cho Chang are both know to have a crush on Harry
Cho Chang (mainly in book 5), and Ginny Weasley (books 6 and 7).
At any point, Harry is either single, or going out with Ginny Weasley, Cho Chang or Parvarti Patil.
In the movies I think Hermione likes Harry then Cho Chang then Ginny.
In The Order of the Phoenix Harry is dating Cho Chang but he ends up marrying Ginny Weasley (his best friend, Ron Weasley's, sister)