Some articles are from other Qzone bloggers. There are some historical reasons for their existence. For these articles, BY-NC-ND is used.
For other articles created by me, BY is used.
All rights reserved.
For materials provided by others (question statements etc.), BY-NC-ND is used;
For materials written by me, BY is used;
Question and Answer by others, BY-NC-ND is used;
Question and Answer by me, BY is used;