Just years of reading. That you bring up the anti-corruption campaign means you're at least familiar with allegations that Xi unevenly applied the campaign against his political opponents. As a side not, I'll say the anti-corruption campaigns in China are definitely popular and also one clear situation where improvements in computer technology made a major advance in society and peoples quality of life. Corruption of low level officials was hard to root out when the people would be making complaints to other corrupt low level officials and risking retaliation in the process. Computer technology helped bypass that.