 Among the rest, those scoring more than 600 points are classified as second grade, and those with 400 to 600 points are classified as third grade.On 16 May 2008, the SACH issued the first batch of 83 national first-grade museums, including the Palace Museum.However, in November 2013, 4 of the 83 museums failed to score more than 800 points in their reassessment, and were demoted to second-grade museums.