Inconsistent signature means that some software has been modified by a third party, including sinicization, de-advertising, simplification, etc. , and the signature when repackaging is inconsistent with the original signature. Of course, people who plant malicious information such as advertisements, Trojans and viruses are not waiting in line. So you need to be careful.

Of course, if you modify the previous installation and then install the official one, you will also get this prompt.

If you really want to install, first, uninstall the previously installed software, and then install a new one. Second, after ROOT, use lucky cracker or Xposed plug-in to modify the system kernel, ignoring inconsistent signatures.