In order to express their grievances, mainland petitioners usually show up at major state activities where they can attract media attention to their plight. For example, on the second day of Indian Prime Minister Singh’s visit, the overseas Chinese affairs website Canyu reported that more than 100 petitioners attempted to enter Tiananmen Square. The police stopped them and escorted them back. It has been reported that the square is now being heavily guarded. One petitioner from Heilongjiang revealed that Beijing has set up a transit point in the suburbs to detain petitioners and prevent foreign media from accessing them during the Olympics. Similar detention centers for petitioners have also been built in all provinces and cities.
Source: Radio Free Asia, January 15, 2008
http://www.rfa.org/mandarin/shenrubaodao/2008/01/15/fangmin/