His presidency was not without controversy.
As soon as the troops arrived, they started rounding up and executing people, in particular scholars, lawyers, doctors, students and local leaders of the protest movement. In total between 18,000 and 28,000 people were murdered. Thousands of others were arrested and imprisoned in the "White Terror" campaign, which took place in the following decade. Many of these remained imprisoned until the early 1980s.
(http://www.taiwandc.org/228-intr.htm Remembering 2-28)
Statues of Chiang Kai Shek were brought in from all over Taiwan and set up on the mausoleum grounds.