Bid farewell to the old and usher in the new.
辞旧迎新
Broaden one's horizon ,be an eye-opener.
大开眼界
The county flourishes and people live in place.
国泰民安。
Try first to make their mistake sound less serious and then to reduce it to nothing at all.
大事化小,小事化了。
Achieve immediate victory.马到成功