On May 20, 2010...

The Taiwan Independence Action Motorcade (獨立台灣會) and Su Beng called for a referendum on the free trade act between Taiwan and China (aka the Economic Cooperation Framework Agreement) and participated in a silent sit-in protest.

A protest to coincide with the second anniversary of President Ma Ying-jeou's (馬英九) inauguration, was set to begin at noon in front of the Legislative Yuan on that day. Protesters planned a three day sit-in to increase pressure on the government to hold a referendum on its proposed economic cooperation framework agreement (ECFA) with China.

Read more about the 5/20 protest in these Taipei Times articles:
http://www.taipeitimes.com/News/taiwan/archives/2010/05/20/2003473411
http://www.taipeitimes.com/News/front/archives/2010/05/21/2003473518

Here are some photos from that day:

The sign on this Taiwan Independence Action Motorcade truck reads:

Want freedom
Have to be independent first



The sign on the Taiwan Independence Action Motorcade truck reads:

Want democracy
Have to be independent first