There is criticism that Hanhwa Group holds the festival only to advertise their company. The president Lee Myung-bak says that Seoul cannot support this festival for advertising the private company. In addition, people who do not go to the festival have to deal with inconvenience because of heavy traffic or if some subway stations are not allowed to approach due to this festival. A lot of trash left is also criticized. In 2011, 25 tons of trash was left after the festival and 130 sanitation engineers cleaned the area until 3 a.m.