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).
In the earlier books, Harry's crush was Cho Chang. However, after briefly going out with her in Order of the Phoenix, he didn't have a crush on her anymore, and in Half-Blood Prince, he developed a crush on Ginny Weasley that later turned into a relationship.
Harry is first in love with Cho Chang (books 4 and 5), later with Ginny Weasley.
Ginny Weasley.
Ginny Weasley and in their fifth year Cho Chang.
Ginny Weasley, Cho Chang (only once did they kiss)
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.
Ginny Weasley. Cho Chang and Romilda Vane used to like him.
Ginny Weasley and cho Chang are both know to have a crush on Harry
Cho Chang, Ginny Weasley and Hermione Granger.
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)