（稍作改动）重新推出;以新形式表达旧内容;换汤不换药a book, film, piece of music, etc. that is very similar to previous ones and has no new ideas or improvements
His new book is just a rehash of his previous ones. 他的新书只不过是新瓶装旧酒（重复他以前的观点）而已。
The information in the report is a rehash of old discussions and misconceptions.