Bulletin board (welcome message)

Copyright: Oh ...... but still free to reprint please indicate the source of it: https://blog.csdn.net/dreaming__ldx/article/details/89409902

Stop more notice:
Because bloggers $scoi2019$ test bombing, and more will stop temporarily to school the end of May.
$5.31：update:$ After a month of fighting and cultural studies, bloggers started again maintained blog, welcome message.