1) If an article is found to have severe scientific errors making the results and conclusion of the article unreliable;2) For article suspected of academic misconduct, such as plagiarism and data falsification, the editorial office will initiate an investigation and issue a statement to inform readers of the risks associated with the article. Once the investigation is completed, the result will be made public. If the academic misconduct is confirmed, the article will be immediately retracted and a retraction statement will be issued by the editorial office.