A lot. The fault rectification of HowNet periodicals can be called a major earthquake in academic circles. The rectification area is wide, involving an unprecedented number of articles, and there will be a large-scale withdrawal of articles every year. HowNet is actually a digital library, and the information scale is quite large. When writing your graduation thesis, you must check the direction you want to write on HowNet, whether others have involved it, and what research results you have, so as to avoid futility.